Stated fuse size is 2 amp
The best way is to remove the housing and see the colors inside,But mine are wired as follows there is 1 red and 2 black wires you only need 1 ground for charging only the other ground and white wire is for the repeater function,looking at the charger side connector only holding the charger you see 2 grooves on one side and one corner has a slant to it,groove side farthest away from slant corner is power and slant side second pin from slant is ground for charge function only,so the corner next to slant should be empty and opposite next to power should be empty,Hope this makes sense if not i will try a picture and send it to the email on qrz,John.
------- THIS IS FOR REPEATER FUNCTION ONLY NOT CHARGE ONLY the first pin on slant side is ground for repeater function and groove side above power pin is for repeater connection