Hello NJGuy & DHackRSX,
First of all - thank you for the warm welcome!
After checking the tech service manual (thanks, NJGuy!) - as I see it up to this point - as far as my specific version of EX is concerned, it is equipped solely with vertical mechanical adjustment screw - one per each headlight ( i.e. via screwdriver from outside ). There is neither possibility to "correct" any horizontal unalignment, nor any "switch" to position the beams higher or lower from inside. As I mentioned before - the car lacks factory AFS system so that leaves me with the only outside manual screw option to tune the beams SOLELY vertically.
The reasons behind all this quest is as follows:
First, all my previous cars had both vertical & horizontal separate screws to "tune" headlight beams individually - 2 screws on each L & R headl - that is for the mechanical manual control of the beams from the headlights themselves;
Second, there used to be 1 little motor on each headlight, connected with a switch, situated next to the steering wheel (i.e. next to switch for turning off the sonar system). This switch usually has 4 or 5 positions to control the motors behind the beams, allowing you to lower or "aim" higher your headlights from the INSIDE - that is if there is no AFS of course. That way when the car is loaded with people and luggage, you can lower your beams to avoid blinding the eyes of the drivers in your opposite direction. Certainly that is all processed automatically by the AFS with the weights and counter weights, etc. ( if so equipped ). However, since my version lacks AFS, the only option I am left wth is to go outside every time and manually lower the beams with the screw behind the beams - as per the tech service manual

Either that or I will blind everyone when the car is loaded. If you load stuff in the back, your front chasis moves up (including your headlights). Since there is no system to keep the lights down, you start aiming for the stars... Which in turn is kinda annoying since this is... Infiniti?!
P.S/ Thank you for the comprehensive tutorial, DHackRSX, it's a beautiful guide, congrats! Unfortunately, I already know the theory and where the lights should be aiming at. The problem is how to control & aim the very beams...