2023 TRD Pro wiring questions

I'm trying to help a friend do some wiring on his 23 Tacoma TRD Pro (at least I think that's the model name he told me). He removed the bed and rear bumper. Made a bed for it. I figure wiring on new taillights and turn signals and reverse lights should be pretty straight forward (hoping). But he has a wiring harness with a box and 4 sensors. Are all 4 sensors from the rear bumper for proximity sensors? Or is it 2, and 2 blind spot sensors? I've also got the rear camera but I don't see where it plugs in. I've included pictures of plugs he has provided with the wiring harnesses that I don't know where they go. Any input is appreciated!!

 

@caribe makaira will know. Caribe knows all

 

Told you he would know!

 

Thanks guys!!

 

All rear lights were replaced with LED lights. Not just the bulbs, but the LED style lights like on flatbeds or trailers. The lights work, but both turn signals flash rapidly like when a bulb is out. Any ideas what could cause this?

 

You will probably have to add resistors. Due to a lack of load, the system thinks a bulb is out and the quick flash is a warning.

 

Thanks. I was kinda wondering if it may be due to reduced load of LEDs, but this isn't my field of expertise by any means. Just trying to figure out all out