I have a 88 honda crx tryna put a b20b?

so i have a 88 crx i bought it wid no motor juss the shell......am doing a b series swap.I already have a B20b with a Sir B16 cable tranny.on inovaite motor mounts...i bought the ecu distrubutor jumper harness nd the juper harness for the ecu obd ! to obd 0....now MY PROBLEM IS what engine harness do i use,,,,,my car came with out one...can someone guide me the right way