transmission install... random bolt?

[Santoku240]

Hello, I just got my transmission back onto the engine, and im now assessing what left i have to do to get the dang car running again, and as i was going through my pile of transmission bolts... i found the two small bottom bolts, with the nuts that go with them, and i found all the rest of the bolts too, but i also found an extra bolt the same size as the two small transmission bolts on the bottom. However, this one does not have a nut to go with it, or a washer. I know for a fact that it never had one because i always screw the nut back on any bolt i take off.

Now, I have all the bolts attached to the transmission now. and ive double checked to make sure. So i thought it might be a bolt for the slave cylinder. but i checked my new slave cylinder and it had both its bolts with it.

Now, i cant seem to think of ANYWHERE that this bolt could have possibly came from, and its scaring me, because im so close to having my car back up and running, and the last thing i want to do is start it up and have something fall off or break because i forgot ONE little stupid bolt

So if anyone has any idea what else could need this bolt, I'd greatly appreciate it! thanks in advance!

[NismoRb20S13]

is it the one that attaches from the engine side at the bottom?

and one bolt prob isnt gonna kill you but isnt exactly good either