Im looking at hard wiring in a bilge pump as per the oem instructions. Ive got the delphi 280 plugs to go into the fusebox.

In the seadoo instruction for the kit is shows a 3 pin busbar... my question is....
Why is it "3" in bar? As only 2 of the pins look like they are used... and if so why cant i just put a mini fuse there??

If the busbar is fuseless (solid) i could just fit the higest amp mini fuse available. ?