Jeremy Harr

I recently purchased a 1992 Honda Civic SI hatchback with a GSR transmission and a B18 engine, while fixing all of the previouss owners mistakes I realized the oxygen sensor plug was a single wire plug instead of a 4 wire plug and was wondering how I could wire my current 4 wire oxygen sensor into the harness, my oxygen sensor has 2 white wires, a black, and a grey, most tutorials talk about green wires, and yellow wires so I'm pretty confused on this topic.