TOTAL BONEHEAD MISTAKE!! and feel like a total dummy! Went out to the river this weekend to do some wrenching on the boat, drop it in the water and do a test run. Then tow it home to replace the floor. Well in my rush to get everything hooked up and in the water before the rain started again I swapped the wires on my No.1 battery. I flipped the switch and immediately saw my wires glowing red, tried to flip the switch back off but it erupted in white smoke and was going for a good 15 seconds before i could reach back in and shut it off.
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Visible damage:
Positive wire from #1 battery to switch melted
Positive wire from #2 battery to switch melted
Negative wire from #1 battery to ground melted
Negative wire from #2 battery to ground melted
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The common wire from the switch to the starter stayed intact.
The stereo wires both positive and negative which were connected to #2 battery both stayed intact.

I replaced the switch with a new perko
New positive wires for #1&2
New negative wires for #1&2
New common wire, switch to starter.

2 new batteries
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Hooked up everything yesterday for a test fire, stereo worked, But I got no response from the motor.

What else do i have to replace? My thought is the starter, but this board has the knowledge, I don't. Any advice is helpful, I'm trying my best not to take it to a shop and spend unnecessary money.

Thanks in advance,

Aaron