Razor blade to notch where the cover seals enough for the wire to pass through or go through the trouble of feeding through the fuse box and out with the factory wires.
Wasn't sure if there was a better way (like the latter option) or if trimming was the best. Thanks Frank! I will probably be utilizing this method (first) to complete my installation.
I haven't personally added a wire to a ranger fuse box in a few years, so don't take my word as the only way there may very well be a better way, that just the traditional solution to a sealed box.