Is it possible to install a backup camera with the MKI 4:3 headunit? I don't have video capabilities with it at this point. What would I have to buy/install/do to make a backup camera work with the 4:3 screen? All input is appreciated!

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2001 4.4i E53 172k 01/01 Mfg

Mods: Led interior lights, rear footwell lights, black powder coated rims, carbon fiber wrapped interior trim, matte black ecs kidney grilles, arnott air springs(rear), rear console-quad usb chargers, K&N air filter, akebono ceramic brake pads & zimmerman rotors, black painted calipers, 5% rear window tint over factory tint, 50% front window tint, rear airbags activated, 4:3 nav head unit auxilary input, diy trans rebuild at 160k, spyder led tailights, hella horns