I thought 92 GSR engines came with Knock Sensors.... if not, you just need to plug in a Knock Sensor into your motor and plug that wire directly to D3 on your ECU harness at the ECU. I got one from Rywire.

I did the same swap in a 92 LS, the ELD CEL went away with new battery terminals and a new battery, my friend's terminals were corroded.