Figure 1: S1 is connected in series with L1 and L2 so that S1 acts as the main switch. s2 is connected in parallel with L2 and L2 is controlled by whether or not L2 is shorted

Figure 2: S2 is connected in series with L2 (S2 controls L2 alone), then L1 is connected in parallel, and then united in series with S1, which acts as the main switch

Figure 3: S2 is connected in series with L1 (S2 controls L1 alone), then L2 is connected in parallel, and then united in series with S1, which acts as the main switch

Figure 3: S2 is connected in series with L1 (S2 controls L1), then in parallel on L2, and then unified in series with S1, S1 as the master switch