Sony XAV-AX200 Operating Instructions Manual page 40

Secure the Tuner
Secure the SXV300 Vehicle Tuner behind the vehicle headunit location or
under the dash using wire ties (not included).
Thread the wire ties through the molded brackets on the underside of the
Tuner as shown. Then secure it to a bracket or wiring harness using the wire
ties. Avoid brackets with sharp edges and any moving parts such as gas and
brake pedals.
Reinstall the vehicle headunit if it had been removed from the dashboard.
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