wire for tach

Is it possible to buy a wire with the harness end on it to fit on the tach on my 240? I pulled on a speaker wire (from the engine bay) the other day to see where it went, and found that it was loosely connected to the tach, with some tape. Well, it ain't connected no more and reconnecting it in its current state looks like a lost cause. So if anyone has this wire or knows where to get one that'd be swell. What's the proper name of it for more precise searching, anyway?

It's the stock coil and distributor set up.