Mine was installed by the previous owner in the same flat location in front of the drive. However I had to reglue mine because it had separated. When I researched it, I think I was told to used silicon and the the trick was to try avoid creating air pockets when setting it in place in the glue.
In terms of wiring, mine was wired from the engine bay, under the rear seat below the storage area on the right side of the boat and to the dash. You will have to remove the large plastic bin under the rear seat to get easier access.
I have since installed a fresh water system with a switch on the dash and so had to run wires myself in the same area. I can tell you the most difficult part is fishing the wires from the rear seat to the dash but overall it was not a difficult task