I wouldn't bother. If you don't have one now it's because you don't have a tool that needs one, and if you buy such a tool in the future, you will get the cable and be able to hook it up to your boom arm then.
I wouldn't bother. If you don't have one now it's because you don't have a tool that needs one, and if you buy such a tool in the future, you will get the cable and be able to hook it up to your boom arm then.