Apollo DB-X19 SuperMoto

[X19Supermoto615]

I’m finishing my Apollo X19 supermoto build and I’m stuck on the last part. All I have left to complete is the brake light. I’ve purchased a generic eBay taillight that has 3 wires to connect: the black is the ground and just gets connected to my bikes ground, the green is the tail running light and I’ll tap into my headlight power wire and will always be on when my headlight is on, and the red is for the brake light. The front break lever came with a switch with two connectors on it. Does anybody have any idea how I run the red wire from the taillight to the front break switch to activate the brake light? I don’t think it’s terribly difficult and the brake lever switch seems to be standard to a number of Apollo models. I’ve attached pics for reference. Thanks!