Electriacl connector query

I only received my Robo3D a couple of weeks ago, but I want to replace the stock extruder with an E3D. My original hot end assembly is electrically connected via a white flat 4-pin plug/socket. In order to avoid cutting existing wires or installing long lengths of new wire I would like to use the same type of plug/socket on my new hot end. Please could you tell me the name/specifications for the type of plug and socket that was used?