I tried this:
85 - to start lead from S2000 button
86 - to ground
30 - to the blue switch end of the IG wire
87 - to the HKS harness end of the ST wire
87a - to the HKS harness end of the IG
I then reconnected the remaining wires on the top half of the blue plug to their counterparts on the HKS harness with some short jumpers. With this setup, it will crank, I can hear the fuel pump priming, and the relay is clicking (working fine) the S2000 button is sitting pretty, yet it won't fire!!!