I haven't used the Pro wires yet, but I do plan on running them down my left arm. I might have to extend the cables, but made it so the pro wires were on the left and the amp and mic are on the right.
You could really just make it any configuration for your use. I just wanted a way to move it form one set of armor to the next. Velcro to the back armor and Aker amp clips to my thigh belt in the front. ( I ware my Thigh belt high )
Also you can really use these cases for just about anything. I was surprised that the inside rubber fit the Rom board perfectly. I took the top part out and used it on the bottom. It cushions the whole thing nicely and no rattling around.