6061 T6 describes an extrusion alloy. It's slightly higher in silicon content than the 6063 commonly used for window extrusions and the "T" part of it refers to period in a tempering oven. It's more brittle than 6063 untempered, tempering T6 would probably make it unworkable for the folds you're describing, Jeff. I don't know whether aluminium is the right material for an electrical connector like that, it would probably be reactive, most electrical/electronic prongs/barbs are steel, nickel, brass or gold plated, which might invite electrolytic differential. Most I've seen are brass or other copper alloy if not plated steel.