reverse/auxillary lights relays

Hello all. This question as probably been answered many times but have not been able to find a clear cut answer. I need the aux. lights to come on automatically with the factory reverse light signal. This step is easy with a 4 pole relay alone. I also need the aux. lights to be controlled by a switch in the cab by themselves when not in reverse. Also easy with a 4 pole relay alone. But combining the two seems to be beyond me. The aux. lights will have their own 25 amp 12v power line. All wiring has been completed except connecting the relays. Have both 4 and 5 pole relays in the shop. Thanks for your help.Cappy

Over the road 2006 Ram 3500

400,000 miles and counting

Just one SPST relay and 2 diodes (1N400x). Reverse & cab switch each thru their own diode with their line ends joined relay 86. 85 to GND. 30 & 87 between the fused aux light supply (battery +12V or IGN) and the aux light.