Wiring questions...

[Ed]

Howdy gents-

I bought a new Mako 282 circuit breaker/rocker switch wiring harness to replace the old fuse based system on my Mako 231. I have the panel installed and it seems to be working (cockpit lights, baitwell, auto bilge, etc) but since I don't fully understand what I am doing , I am not so confident that I have the connections to the terminal block wired properly/safely. Also, where does the green wire from the gastank sending unit connect to?? Probably a stupid question but don't want to blow myself up.

If anyone has a basic wiring schematic (for a similar system) I could look at or detailed pictures of their system, it would be much appreciated. Also, any suggestions for reading up on 12v marine electrical systems???