Newbie Questions

We hope to pick-up our "new" 1996 2720SL trailer this Friday.  Since, the seller is not familiar with the TM, I had a couple questions for anyone with some experience.

1.  Does anyone have a wiring diagram for the trailer connector?  I installed a 7-pin round connector, but not sure if they will mate up correctly (i.e. ground, 12V, turn signals, etc)

2.  Is there a set sequence for set-up and take-down of a 2720SL trailer?  I don't want to accidentally close up the trailer wrong and break something...

3.  Did this model year come with a power vent in the roof?

4.  What style fuse is required for the Thetford toilet?