I have a Banks OttoMind engine calibration Module. There is a 4 wire cable that runs from the module to the instrument panel. the 4 wires are Black, (common ground) Green (gauge) and White (gauge) and...
I went through Banks site and didn't find your model number. You could try calling Eric Davis over at Eric's RV in Sequim. He did a lot of work with Gale Banks.