UPDATE:
Since I don't have a dash harness I decided to make my own for the all the cluster lights for now at least. all I really need is to get the HVAC stuff rigged up, I have the blower on a switch and the heater core hooked up where its on permanent defrost mode and full power on the blower or no power at all, which is all I honestly need where I live so for now it'll do, but one day ill get there, I still have the OEM body main harness so the three plugs on the cluster harness boil down to two plugs on the body harness end, a white and a black plug. I took all the tape off and individually traced all the wires...
after two days of soldering it was completed and almost all the way tapped up...
with all the lights on the cluster working that I want working ( I didn't enable the seatbelt light but the wire is there for a lead if I want to later, and I also de pinned it for the Over Drive auto trans light and the ABS light) I began chopping up the innards of the dash to fit the NX cluster. It required quite a bit of grinding the dash. specifically in this area where the steering column mounts- I had to completely cut this section out and grind down where the top of the air vents are in the middle by the column...
I also shaved the fins off on the right hand top side of the dash, and everyone says you have to grind the back tab down on that piece labeled "LH" that bolts on the top underside but I found it doesn't impede and left it alone, as well I'm thinking if I ran a longer screw at the very middle top of the NX cluster it would perfectly grab that mounting tab and I could have a 3rd mounting point just like the s13 OEM cluster mounts (cuz everyone seems to just mount their NX by the two bottom feet and they say it'll hold and won't break or rattle or fall in)...
everyone also says you have to shave the parts on the side for the cluster to fit width wise but again I didn't have to touch mine. it seems to fit fine, just grind those fins and above the steering column and the vent tops.
Also my S13 dual cam 4 pin MAF finally arrived from A1 Cardone and boy does it look like crap. I hope it works better than it looks. the top black section is lumpy almost like it was on fire at one point
and its clearly been repainted as there is silver overspray on the side of the plastic terminal and I hope im wrong but it looks like even on the little sensor wire inside the housing
and I went to change it out and quickly learned the s14 black probe style MAF I have has a different bolt pattern on it so its cold air intake adapter wouldn't bolt on. Luckily I happened to have an OEM airbox in great shape laying around that it bolted to so for now I was able to use that and finally I plugged the last plug of the harness up!
I also got a brand new battery today so tomorrow ill be installing that and bolting the cluster in with the harness on it and plugging the harness extensions I made for a "dash" harness into the cluster and plugging those leads where they need to go, trim the cluster surround to fit over it and run the switch wires from it to replace the temporary switches I thought I was gonna use, and that should be everything, just turn the key and flip the switches and away she goes. ill have to get an exhaust if she runs though and an alignment and drop the suspension some. found an instant gentlemen body kit for sale locally so I might pick that up. as well found this thread about how I could wire my HUD unit up with the NX if I wanted to
https://zilvia.net/f/showthread.php?t=666001