Yeah, you can get some different effects by having 8 connectors on the back, 4 from the board and 4 from the yoke, and cross patching the connections with only one set of speaker inputs. So you might have board connection 1 going to yoke input 3, board connector 3 going into yoke input 4 and the other two yoke inputs taken with a speaker input.
I have a couple of wobblevisions built like this (including a green screen and a blue screen monitor) but i'd never do this on anything i was going to sell as in my experience if you accidently plug the speaker inputs into the board connections or if you plug a board connection into another board connection, something is going to go up in smoke. Also, i had a couple of old amber screen monitors that just burnt out when i did a certain cross connection on a patchbay. Most CRT's seem to be alright with it but its a little risky.
That connector looks like a specialist one for this job, at least i don't think i've ever seen it on anything else.