Those actually look like star signal product housings. Maybe rebranded adamson??
You could deduce that red is positive and blacks are negative. Likely white or green is your pattern wire. Are both whites or both greens connected together? Can’t discern from the pic. If one or the other are tied between light heads pull them apart and see what happens. If they unsync u have your answer. Always try grounding the pattern wire prior to giving it 12v. Whelen uses positive triggers but I feel like most other manufacturers use negative.
Good luck,
Seth