2016 Taco tail light wiring

Hello guys,

I'm a new member and already need your expertise in assisting me with wiring question.

I just recently upgraded all my exterior lights to LED. I also purchased and installed 50W 6ohm load resistors to the rear signal lights to prevent hyper flashing.

This worked fine until I noticed that the turn signal start to flash fast when I depress the brakes. So, I am assuming that I also need to install another load resistor to the brake light to prevent this problem.

The problem I have is, I do not know which wires to connect as there are 3 wires each for signal and brake bulb housing unlike only 2 wires in the front signal light.

There are numbers (1,2,3) stamped on the plastic connector. I just need to know which wire is ground and which one is the hot (signal & brake and not the running light wire). I am uploading some pictures.

Would appreciate any help you can provide for this correct installation.

Thanks!