I recently picked up a Kearsarge 402 timer which is great but I don't have a foot switch for it. I do have an old Omega foot switch that is two pronged and is spaced right for the Kearsarge plug, although I will have to trim it. The question I have is if I need to worry about the third prong which appears to be a ground on the Kearsarge. Here is the outer side of the plug. I'll only be using the bottom two inserts and the top is the ground. Here is the backside of the plug. The green wire on the left appears to be the ground since it goes straight into the actual cord to the wall. The two green wires on the right in the shadow are the grounds from the outlets for the safelight and the enlarger. Looks like they all go through/around this foot pedal plug. Here is the plug on the foot switch. Two prongs, no ground. So my question is do I need to be worried about the ground? Or can I just adapt this foot switch to the timer and go? After I took these pictures I pulled apart the plug to check if one prong had a ground on it, but they are standard black/white wires. One prong is larger than the other, the larger one being black. Any suggestions/advice? Thanks for your help!