Yeah, like the guy says in the videos it is dark but he put pictures in
a bit of advise I can give you for this job is to buy the maxpower 306 Haynes Manuel.
I know I will get slated for it but it's helped me loads, when removing the old head unit on my car and wiring in my sub it was all very helpful,
there set my step pictures on how to do these things including lowering the front,
they don't really go into detail into lowering the rear but those videos are more informative
the normal haynes manuel and the maxpower one you should buy as they will help loads