Step one mount the servo to the plexiglass as shown in the pic.
Use strong servo tape. In the pics I used 3m double sided tape, and it did not hold (I found some real servo tape later)

Step 2 take the bind plug(or the servo plug), and make sure you are using 2 of the connectors next to each other. You can usually move the female plug by lifting a tab up. If you are using a standard 3 pin servo wire with wires still attached skip this step.

Now solder a red wire (or remember that the center pin is positive) to the wire coming out of the center pin. I just soldered it straight to the red wire on the connector I'm using. Solder the negative to the switches one terminal, and solder the other terminal to the other pin for the connector.

Now mount the switch where the arm from the servo can hit it, and secure it with servo tape.