Making a TX pack for DX7

[Scottlclem]

I bought a used DX7 with no tx pack and I'm making a pack for it now. I can't tell which pin is postive in the DX7. Could someone look at there factory tx pack and tell which pin is postive in relation to the way it plugs in.
Thanks in advance

[Scottlclem]

I found the answer to my question , posting it in case someone else needs to know.
Looking at the transmitter from the back the postive pin is on the right side.