I took out the light
over the rear table and cut the hole there and used the wiring that the light
used for the fan. Make sure when you cut the rat fur you dont cut too much away - you want to make sure you have enough to fit back under the trim you use on the inside. I used a low profile fan but it still hung down into the trailer a little so I just added a wood trim piece around it on the inside to match the one on Scamps escape
hatch. Not perfect as it does come down about a 1/2" inch but as it over the middle of the table so no ones is going to hit their head on it. Used Butyl tape to mount it flush on the outside.
If I was to do it again I would make sure which ever brand of fan I purchased had more than 3 speeds and that it had the auto closing feature in the event of rain.