If you want to leave everything "original", you could
1. Buy male and female molex pigtails and make your own plug and play harness between the current output and input molexes.
2. get some posi-taps (
https://www.amazon.com/Posi-Lock-Connec ... s=posi-tap) and tap the wires from the existing plugs. Posi-taps actually work and you can remove them later. Don't use scotch-locks. They are garbage.
3. get a terminal pin tool (
https://www.amazon.com/Lisle-56500-Term ... moval+tool) and pop the pins out of the molex plug, then see if you can rig up a terminal that will fit the wire/molex terminal and heat shrink it. Then to revert back to factory, you'd just cut off the heatshrink, unplug the terminal, and plug back into the molex plug.