Ayuh,... It won't be model specfic,... But pinned to the top of the Electrical forum is a generic diagram...
You'll be able to figure it out from that...
You also might try contacting Glastron directly and they should be able to get you one.
I needed some information and sent them an email and in about 3 days or so they sent me a pdf of my boats owners manual.
Good Luck