Tail light wiring harness

[Mustang_Driver]

i just got 2 wiring harnesses for my tail lights and am not sure which one is left and right i know it sounds stupid but i have the part numbers and they are:
F7ZB 13407 N160S
F7ZB 13410 N160S

I haven't pulled the car apart yet but these are the replacement ones i got as i am putting seq.tail lights in and the kit is splice in and didn't want to kill my original harness

 

[Mustang_Driver]

it's ok i just went with my gut and pulled the tail lights out and found the right one... thanks anyways