LPL ET-500 Foot Pedal Connector???

I have a LPL ET-500 timer. I would love to a foot pedal, but would rather not buy one online. In looking at the connector it seems to be a typical DIN 3 pin plug, can anyone who has a little more knowledge confirm this? I think it would be possible to buy a male connector, and wire up a momentary foot pedal.

Thanks in advance!