It's old tech and I forget because power commanders back then came with a pre-made 9v battery adapter and additionally with the serial communications cable connection. Check the Documentation forum for Fuel Managers. The manual is there too.
I had the PCIII USB version and needed the cable adapter to set WOT without the motor running. This is what I bought in 2016 and it worked. Picture wrong in the Ad but the adapter was right. I assume it’s the same adapter needed fir a serial PCIII?
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