You're right Jakko thanks. I've found loads of images - and almost every one shows a different layout. I guess with something this big, they're always trying out new equipment and layouts.
It probably also doesn’t help us modellers that there ar a good number of variants and most of those seem to have subvariants again, so you’re going to have to put in a lot of effort sorting them out if your intention is to build a specific one. Or you can just make something that gives the right appearance.
after all that, what can you see? Naff all, that's what you can see!
I see a Humvee bumper
What's the absolute minimum I need for a small light set up inside?
A battery, an LED, and probably a resistor to make sure the LED doesn’t burn through prematurely. You may also want to add in a switch so you can turn the whole thing on and off. If you want, I can supply more of the theory needed to work out what you need in terms of resistors etc.
I was thinking of two tiny bulbs front and rear and hiding a tiny battery and switch in the flare box that fits on the rear ramp. The inside dimensions of the box are 15mm wide, 26mm long and 19mm deep. If I can get a switch and battery in there
A small watch battery will fit fine in there¹ with room to spare for a small switch, I would think.
I wouldn’t go for normal, old-fashioned light bulbs, though. LEDs need far less power, making them last much longer on a small battery, they don’t get as hot (this could be important in a plastic model) and pretty much will never burn through.
¹ Bonus tip: Numerical designations of these batteries tell you their size. The first pair of digits is the diameter in millimetres, the second pair is the thickness in tenths of a millimetre. For example, the very common 2032 battery is 20 mm in diameter and 3.2 mm thick, a 1620 is 16 mm across and 2.0 mm thick, and so on. You won’t even need to find one and measure it to work out if it will fit in a given space on a model.