I agree with EngineerMike, at least somewhat. I learned what I know from reading manuals that came with various components over the years. They do show how to properly set up their component. Some are pretty easy to comprehend. Some are not.
What I have found to be the biggest problem is something that none of the manuals will be able to tell you. Our coaches have more possible signal sources than any home system is likely to have. They are:
Over the air antenna
Cable system in campgrounds
Roof satellite dish
Auxiliary satellite dish
VCR (at least in older coaches)
Then it is complicated by the requirement/desire that any one of these video sources be available to the front TV, the bedroom TV, and an auxillary TV outside. And sometimes different ones to each of the three at the same time! No component manual will help you with that! Some home theater guys probably aren't familiar with the requirements either.
Personally I have used all 6 signal choices, and frequently do. (Other than the VCR that I threw away.) And I can view all choices on the bedroom TV or the aux TV that I don't have. So it can be done. Just not easily/simply.
Then to complicate things even more, WRV changed the components they used frequently during the model year. Sometimes they had no choice, as the items they selected were discontinued. Many of the things I put in my system are now obsolete, so don't bother asking me what I used!! And as anybody who has tried to replace any component in his system can tell you, not all components will fit in the limited space. Right angle connectors help, as EMike said. And I highly recommend Cables To Go Mini-coax cables, which are lighter in weight, much more flexible, and come in various lengths.
In fairness to WRV, my coach was wired in such a way to make all of these things work. They even did a fair job of documenting how to make the whole thing work in the owners manual. It worked like they said it would work. And they provided a schematic diagram of the system, although maybe a revision behind. What they did not do was optimize the wiring to improve the picture quality to take advantage of the big screen TV's in the front. That would have been pretty easy to do, but it would have made the system even more complicated to use. Providing a properly programmed universal remote would have solved that. I guess they eventually provided one, but I can't comment on how good of a job they did programming it, as I have my own universal remote control of choice. I have the same remote for my two home systems as I have in the coach. Easy to remember which button to use!
I have one more little wiring change I want to make to eliminate the A/B switch to select between the roof satellite dish and the aux satellite dish. If it works, I will consider myself done!!! Until I decide I want HD in the coach. I am saved on that right now, since the plasma TV is ED, not HD. So until I replace the plasma, HD is not necessary. And the plasma works fine.
Anybody still reading this? I didn't think so....