J-B Weld 8276 KwikWeld Quick Setting Steel Reinforced Epoxy - Dark Grey 2 oz

If the internal wiring is fine, (not cut) and you need to repair the housing, since you cannot use a real welder try JB-weld. https://a.co/d/0h1QYiNW High strength 2pack: https://a.co/d/0g1Vx5bU It's a 2 part liquid welder. It gets hot when mixed. You should be able to apply it and as long as your holding it in place for 10 mins it should chemical weld back together. Maybe put a small layer on to top part inside (hoping it slides down) and then seal the outside. It will look repaired obviously.