Someone may have already done it on your model and can give you more specific informaiton but I would try to get the wiring schematics for your coach along with the structural and plumbing schematics.
First you will need to know the best place to mount it so you will want to know where the roof supports are running, etc.
You probably have at least two 12V ceiling fans / vents so that would be one place to look for a place to tap into the 12V. Another option would trying to run wiring down one of the roof vents for the black or gray tank if one happens to be close to you electronics bay.
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