I'm planning on installing an Isspro 5503 tach on my 1993 cummins. Everyone recommends not getting the "wiring" kit from Isspro. What connectors is everyone buying to tie into the factory tachometer plug under the steering column?

I haven't dug into the project yet, but I'm assuming by looking at the pictures that the factory plug has female plugs.

 

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I cut mine off and soldered new wire to go from where the connector is to the tach. I did this so it would never come apart or wiggle loose on me. But if I remember right, they are an 1/8th inch wide spade connector but this is from 3 years ago so don't quote me on that......