First you would like to know what to search for... You are looking for the round 10-pin diagnostic connector. This link also shows some of the various locations of the 10-pin diagnostic connector.
Once you have located your diagnostic connector, remove the Cap of the diagnostic connector.
- Make sure your interface is the correct side up and the connector ring twisted as far left as possible. Make sure the ignition is OFF at this point and the USB cable preferably not connected to the GS-911 interface at this point.
- Align the receptacle correctly (with the red tab at the bottom), and insert.
- Finally, twist the connector ring as far right as possible, to lock it in place.
- Connect the USB cable, if using USB.
The procedure to disconnect, is the reverse of the above steps.