Yep need to splice them back together. The electric brakes run on 2 wires, call it supply and return. On the drivers side you'll have a spot where 3 supply wires come under one wirenut, one from the RH wheel, one from the LH wheel, one from the front of the TT. Same with the "return" wire. Just visualize supply to the brake and return from the brake.
2019 F150 4X4 7050 GVWR 1903 payload
2018 Avenger 21RBS 7700 GVWR