Hi - There is one USB port on each of my touch 5600, non-touch 5600, and non-touch 5500 that's used for database/software updates. I'm interested in having Foreflight on my ipad talk to these displays. The Skyview Wifi dongle apparently works with the 5500/5600 AFS displays, but requires a USB port. Are there additional open USB ports underneath / on the back of my panel? Would be helpful to know before I start crawling around with a flashlight to look for them.

Cheers,
Jeff