Sorry bud, meant to check for you but was distracted by becoming a grandad, yes, I know, ridiculus at my age I know. I will look when I get home, promise.
Found it. If your putting your gas ECU in the compartment behind the battery conviently vacated by the GEms ecu you can split the harness just behind this compartment. The rpm signal is a plain grey wire. The O2 sensors are B16 and B15. Depending on your system, these may not be necessary. Most advanced systems only use these for diagnostics in the LPG software.