Fuse on a 1994 Trans-Sender

[joepiccaso]

I have a 1994 CC Trans-Sender that I'm upgrading from 36V to 48V. Look at the pictures attached and tell me what this fuse like device is and if I still need to wire it in on my new system. It looks like a heavy Power Line fuse, but the outside piece, looks like an old charger plug connection. I wasn't using it as it had an onboard charger, and I'm installing a new Summit II onboard charger. So, is this thing related to the old charging system and do I need to keep using it? Or, is there something else I need?