Taillight

I wanted a clean and stylish way to mount a brake light turn signal combo on my Rawrr Mantis X so threw this together. Working on an install video and will update this when I do. The bracket can be affixed to the underside of the rear fender using the pre-drilled holes using 3mm nut/bolt pairs that are at least 40mm (1½") long. 
Brake light can be purchased here (not affiliate link): https://www.amazon.com/dp/B0F1YQ2PQX?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

Wiring adapter here (also not affiliate): https://www.amazon.com/dp/B0DHTV4T4Y?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1 

Wiring the bike to the Tail Light

leave the rest disconnected unless you get turn indicators and want to wire them to the yellow and green on the light.

Here's a little table with wiring on the bike and brake light after probing with my multimeter. There were no voltage changes to Blue, Green, nor Yellow when pressing the brake. Black has no voltage unless the brake is pressed (obviously) and there is no voltage drop on Red when the brake is pressed.

The document with the light did not indicate if yellow or green is either left or right so I'll have to figure that out later.