John,
This unit has an accessory heating element as an option and the wiring harness probably allows for that but we do not have the heating element installed in ours. You have the same filter unit as the rest of us but a longer aftermarket cartridge filter than the original Racor replacement. There sometimes is a small trouble light thing in this bay, se if the wire might go to that and if not I think you are all good to go, just tie wrap that wire out of the way to the existing water sensor wire.
Later Ed