The MB forum has them -
http://www.mudbuddy.com/forum/showthrea ... #post74952They are also on the BPS site:
http://www.backwaterperformancesystems. ... th=117_119The diagrams include all the engine wiring. I would recommend you print the PDF and put it in a zip lock with a length of wire in the boat so you can use it to bypass a switch etc... to get back to the ramp.
You can also save the PDF as a JPEG and upload it to your phone so you have it.