When I made a new cable (about 2 years ago), got the end connectors (Cable lugs) fron a local electronics parts supplier (in the SF Bay Area). You may be able to get them on line or from a local auto parts store. Mine are heavy duty, not the cheapie thin gauge aluminum you may see at Radio Shack. I used ones that were intended for engine bay connections. I crimped and soldered the connections, then filed off any excess solder. As to the insulation, I used the canned stuff (can't remember the brand) that's used to dip you pliers, etc. in to put insluation on the plier handles. Sprayed the finished product black to match my seats.