oxigen sensor

bought a bosh sensor for my 1990 prelude si. Does anyone know how to connect the wires to the original honda sensor. the aftermarket sensor comes with 4 wires, 2 whites, one black and 1 grey. The original has 1 black, 1 green, 1 white, and 1 grey.

match up the original colors and the ones left over should stand out. :)