I can't even imagine the cluster&^#! of wiring in that boat, with nearly every electical item having it's own space on an electric control panel!
Our boat's wired like a house, nothing fancy, it just works. The entire electric system controls are confined to the helm. The top 2 switches on the switchplate control the two 12 volt legs. (there's also a 12v breakers in the engine room) The 120 volt inputs are controlled by the black 'ship-shore-inv' switch below and to the right of the steering wheel, just pick the one you're using. Under the helm hidden behind a small door is a small 120 volt breaker box.
I've been going to install some voltmeters, but after 5 seasons with this boat, I haven't found it necessary...
As for the question of "what is the BYPASS switch"? Not a clue. "Bypass" seems to be a misnomer, since if you bypass something, you're not using it... ?
1988 SkipperLiner 53x14
1995 Tracker Party Cruiser 32 *for sale*
2003 Chaparral 260 SSI
2000 Allegro Bus 40' DP
Click for full image