Replace broiler element

Heater elements don't have any colors on the terminals. They will work any way you connect them.
In general, wires are always connected to wires of the same color.
I am concerned that you may be doing something other than replacing the broiler element. If so, it is very important to return the machine to the way you found it. If you can't remember what that was, you should call a professional repair technician.

Good luck!