I have a Tekonsha P3 brake Controller. It came with both an unterminated vehicle side cable as well as a Subaru Specific cable with connectors on both ends. I noticed that the unterminated Subaru supplied cable has a 20 Amp fuse in the blue wire to the trailer brakes. The cable with both connectors does not have a fuse and all wires are the same size which I believe are 14 awg. Does the wire to the brakes need to be fused or is it safe to use the cable without the fuse? Is the 12 volt power to the brake controller separately fused? Any help would be appreciated. I plan on towing a single axle trailer less than 2900 lbs loaded.