Are you sure it's supposed to have a molex plug? That controller does not have an integrated plug, a diag port has to be wired into the harness. Most golf carts have a different style plug for the programmer which requires an adapter
I bought "Handheld Programmer Replacement for Curtis 1313-4431 1313-4401 1311-4401" on Ebay. It does everything I want to do. My neighbor used it also.