Use an original Automower coupler to connect the guide wire to the boundary wire or repair a damaged wire in your Automower robotic lawn mower installation. The plug is filled with grease, making it weatherproof. How to use an Automower coupler Push the wires into the bottom of the coupler, one wire per hole.* The coupler has three holes — it does not matter which holes you insert the wires in. Squeeze the coupler using pliers. Make sure to press down on both sides of the coupler. Secure the coupler by placing it under the grass, away from the work area of the installation. If you are using PRO wire, you need to remove the outer protective layer before inserting the wire into the coupler. Connecting a guide wire to the boundary wire: Repairing a damaged wire: