Got a Stellar Wars in pretty good condition that i recently got out from the garage after 10 years, changed all the switch and it works like clockwork except for the left lower kicker.

Im pretty sure i know what´s the issue and i need some technical help with the wiring.
At the right kicker there a two red wires and one black, one of the red wires appears to be connected to left kicker. but the left kicker only has one red wire and one black, it also looks like there been two red wire´s there back in the days that´s been cut, but i cant fint it, any suggestions?