I came across a 2 pin stagepin connector, no ground, in the parts bin. It's not just missing a pin, there is no hole for a 3rd pin. It also has spaces in the back for two wires to come out on either side instead of one cable. Any idea what it is? I'm guessing it would be used for a practical. It is missing its cover and was well wrapped in electrical tape for its last use. I took off the tape and there are no markings on it.