Thats a pic of a 2, 6 & 9 way connectors. I do other ways as well including a 3 way of course.
Thats a better pic of the 3 way locked but i had to include my test pic
they are called ASHLOK Connectors.
Im building a majestic at the moment and it has a 6 way version coming out of the wing. So theres mistake of my having my alerons connected the wrong way round and more important connection failure!