I searched all over and could not find any info on this so I thought I`d post this up for future reference:

I ran the power from the circuit breakers, and the discharge on the port side in the crease under the bench seat along with the T stat wiring:











Same side with the supply air:







I drilled an access hole to see where I was drilling thru and to help feed the lines. The hole is in the solid piece of the boat not the first piece that serves as a cover so unless the cover piece is unscrewed and removed it`ll never be seen.












4 1/2" hole in the arm rest (dead space) then I fed the line up into the corner (another hole from the top)