The 2 main rear lights at the back, what the heck is the one below them called, I broke mine
It's red well it was red, until i smashed it. Not a fog light
If it is none of these that people have suggested then its not a light. There are built in reflectors in your lights they are the only other red bits.
The only lights you have to the rear are:-
Side lights - Red
Brake lights - Red
Fog light - Red
Indicators / Hazards - Orange
Reverse - White