From the CB1 connect from 15 and 18 to either of the two connections on the keyswitch.
This will allow opening and closing of both gates on a double leaf gate system via key.
To open only one leaf of the gate connect to 15 and 17.
Keyswitches come as standard with all Liftmaster LYN and SCS series Gate Kits.
If you wish to purchase a keyswitch visit our accessories page here – Access Control Accessories.