The three gang box previously had a HLV combined switch plus a switch that operated a separate light. Stupidly, I removed and discarded the switches and units (light and HLV) without studying the connections. The gang box now has 2) 12/2 and 1) 12/3 romex. I want to connect two independent lights and a vent. When testing I am not finding a hot connection. In the ceiling one 12/2 is connected to the Broan vent with a black/white and ground. The other 12/2 goes to one light and the 12/3 is connected to the other light with the red wire capped off. What am I missing?