I have a 1983 Toyota Tercel and want to attack a tachometer for idle adjustment purposes. This is the tachometer that I am going to be using.

I picked this up at a thrift store and have not had a chance to see if it works. However, I need to figure out where it needs to attach to the distributor.Here is the picture of my distributor.

There are only two wires coming off of it and I know that one of them is the one that I need to attack it to.

From what I have found it would be the black on with an orange stripe, but I'm not sure. However, there is also this orange, possibly with a white stripe down the side, wire attached to the same set of wires that I would maybe guess would be a direct connection to the wire I am looking for.

There seems to be wire going to the coil for testing purposes in the manual but i am not sure which on it is. Any help is appreciated.
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