I just bought a used Hampton Bay 300W Low Voltage transformer for landscape lighting. It appears to have 2 circuits, A and B. Both A and B each have 3 terminal connectors, labeled Low, Com and High. I plan to connect a 12 gauge cable to each but am not sure which connectors to use. I assume I use the COM and either Low or High on each, based on load or cable length. Would really like clarification. Also would like manual. Spent an hour on phone with Home Depot but no luck. The unit was manufactured in 2008 in China (but apparently sold as part of Hampton Bay Lighting Kit).

Any help greatly appreciated.

Go to HD and look at the transformers for other Low Voltage lights. They are all very similar and you can probably find the manual to look through. I am running 40 watts-six lights total, 5 pagoda and 1 spot- through my 80 watt transformer and it is connected AB