Look in the stickies at the top of the page - it may take a little digging but there used to be a good thread with pics. You can also use the "search" - there have been many headlight motor threads over the years.
It's one of those jobs which is a PITA the first time but once you get the hang of it it's no big deal.
BTW - it's common to have the thing 180 degrees off when you put it back, which results in one up and one down, or refusing to work at all. Don't panic.
I bought my Vette from a lifelong friend who was a very good mechanic, however he was not computer literet. The left headlight gave him trouble about ten years ago so he bought a new motor from the Chevy dealer and installed the motor. After I bought his Vette The right headlight started to give me trouble so I followed the helpful tips and printed the instructions to just put new bushings in the motor gear. My good friend spent $250 ten years ago and I spent $15 bucks and the light works just fine. Take your time and you will be proud of you job when the light spins around and then stops when it should. I just love how the Vette lights spin around when I turn them on, but I love everything about my 90 Quasar Blue beauty.