I have 2 Waterways skimmers, with diverter valves under the baskets. I'm trying to figure out the best placement for the flaps. Underneath, there appears to be 2 pipes, assuming 1 goes to the main drain (I do have 2 main drains), and the other 1 to the filter. I've tried different positions with the diverter valve, and either get 1 skimmer working, or the other. I haven't been able to figure out if the main drain is sucking or not.
Here's a picture, the pool is to the left; equipment pad/deep end of pool is toward the bottom of the pic: