sat nav system?

You may even have a wireless enabled satnav.

Please tell us the make and model.

Better still: read the manual

Gary
August 2017

That would largely depend on the make and model of the sat nav. Unfortunately I am not psychic (despite any assertions to the contrary on the part of my children) so I can't even begin to guess.

One would suggest there may be a connector marked "AV In" or "Video In"

It may be expedient to read the manual.

If you don't have a manual, reputable manufacturers usually make their documentation available online.

Acp
August 2017