There is no mechanical or electrical reason this will not work. It IS unconventional to use that type of wire in this type of application. Take your time and do a good job on your connections. Soldering would work best, but properly crimped/sealed butt splicing is a close second.
Beware the relay mongerers........
"For Gawd's sake, put a RELAY in there or you could burn the whole damn Jeep to the ground" ...this quote brought to you by people who do not understand the law.....Kirchoff's, Ohm's, or Faraday's.
Violation of KISS shall always ring false in TRUE engineering. - ME___
Had 75CJ5, 89YJ, 93YJ. Have 82CJ7 & 95YJ____Not one burnt yet due to lack of relays.