HELP with reinstalling my dual battery system!
 

I left a switch on and drained my battery. I took them off to have them recharged without looking at whered everything connects. I can get the boat to start but cant get the second battery set up properly which i am thinking runs the stereo amp bilge etc.

I have a switch with 2 blue cords for battery 1 and 2. There is also an additional blue cord which I think connects between the batteries (not sure where) There s a connection from the kicker amp I also dont know where to connect nad two other connections (they are older so I assume these run the engine. Im attaching HELP ME GET MY BOAt RUNNING AGAIN!

Thank you for any insight.

I beleive I blew a fuse messing with this also which i will need to replace