Hello My right rear taillight assembly was cracked and water was leaking into it so I had decided to replace it. The replacement assembly that I purchased is a bit different as you can see from the attached file. The original had a circuit board within the bottom of the assembly. I have no idea what's the purpose of this circuit board is. The body harness feeds into the circuit board and from there it goes up to the brake light LED. The new light assembly without this circuit board seems to work just fine so I am wondering what the purpose of it is. It would be easy enough to splice the circuit board into the new assembly if it is necessary and has a purpose. Can anyone assist me with an explanation? Thanks