Here ya go. On mine, it is on the upper most left side of the pump area against the hull. That hole is threaded and it screws right in. I checked the other engine on my boat and since i doesnt have the speedo on that side, it still has the same threaded hole. It just isnt open on the inside. I included a pic of that one. Hope yours is the same, if not maybe someone with a 95 will chime in.
Wow.... I do see that the boat "came" with the wires, and I do see the wires close to the drivers side pump that go all the way to the gauges... wow... I didnt think I had to drill a hole, thats scary drilling a hole so close to the pump?