All I'm really after is the piece of plastic and connectors that acts as the socket for the plug that comes from the car wiring. The socket that can take this plug :

I'm trying to add an extra section of wire to sit in between my cars wiring connector and my rear light. Much like an extension cable with a male connector on one end and a female connector on the other. This way I can splice into the little bridges wires for extra connections to intercept the signals but have the possibility of removing the little bridge cable to return the car to original.
I already have https://www.ebay.co.uk/itm/273705118649 which is a copy of the male connector coming from the cars wiring (A2 in the below diagram) with its connected wires so that can plug into my rear light (B1). Now I need the socket part (B2) to add to the other end of those wires so the cars wires can plug into it.


I'm trying to add an extra section of wire to sit in between my cars wiring connector and my rear light. Much like an extension cable with a male connector on one end and a female connector on the other. This way I can splice into the little bridges wires for extra connections to intercept the signals but have the possibility of removing the little bridge cable to return the car to original.
I already have https://www.ebay.co.uk/itm/273705118649 which is a copy of the male connector coming from the cars wiring (A2 in the below diagram) with its connected wires so that can plug into my rear light (B1). Now I need the socket part (B2) to add to the other end of those wires so the cars wires can plug into it.
