Working on outboard and shorted power source

Oct 13, 2015
12
Catalina C309 Stank Paw Slough
We were working on the outboard and had to remove it. We uncoupled the harness and worked on the motor and while replacing it we shorted the wires together .

Now it appears a few systems do not work. It was only a momentary short/spark. Seems like things won't run off the battery. So on the battery's positive terminal, there is something that says 300W ...buss? is this a fusible link? IS there anywhere else that is or could be affected by sorthing the battery / power cable?
 

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