I'm installing an MS3Pro PNP for one of the service advisors at my work. They have a 2000 Miata and I got the ECU installed, running and ready to tune but the charging light is stuck on. Battery voltage in TS shows proper voltage and the alternator is set to whatever settings come stock on an NB base map preconfigured by DIY.

Is there a setting I may have forgot to configure? Do I need to run a different wire from the Rear Option Connector to make it work? I can upload a copy of the map tomorrow morning when I get to work if that's needed.

I'm used to messing with my NA in TS and this is the first NB I have dealt with in Megasquirt