A:Answer To connect a wired backup camera to the RV 890, you must use an optional video mount accessory, the Powered Magnetic Mount with Video-in Port and HD Traffic (010-12982-02), which includes a 3.5 mm composite video input jack.
Otherwise, the recommended and compatible backup camera to use with the RV 890 is the Garmin BC 35 Wireless Backup Camera (010-01991-00).