The video/sync lines from the jamma connector to chassis is pretty taut in my cabinet. My MK1 has an extension to this connection (10pin to 10pin, in the grey casing) and I was wondering if it's available for purchase anywhere (maybe I'm searching with the wrong wording).
If not, I could create one myself, which would just be the correct length I want from jamma to chassis (as opposed to the 10pin to 10 pin extension). If I go this route, I was curious if I should wrap a wire around the ground like as seen in around the black wire in the picture attached. What's the benefit of that, and is it necessary?