I wanted to have the ability to go from the HRC box and back to stock at any time (why, I don't know). I found that some early 90's Honda Civics had the same gray plugs. Snipped a few and spent several hours changing wires and pins around. Put he corresponding plugs on the stock harness. My HRC box can now be unplugged and the stock harness plugged back in in just a few minutes.

Don