used ex35 and odd rca cables. What are they for?!

[nguystep]

Hey guys,
Just purchased my used 2008 infiniti ex35.
excited and happy, but I have to figure out what these cables are for!
It looks like the previous owner had spliced 3 rca cables into a black garmin box underneath the passenger side dash.
I really just want to know what these were for so I can do something about them.

Thanks, any information will greatly help!
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[XIS]

Plug them in, put it on AUX and see whatcha' got!

[Teknical]

The RCA cables in the center console are stock. See the owner's manual. It's the AUX video input. Not sure about the Garmin cable. Maybe power so they didn't have to use the cig lighter socket? Let us know if you figure it out!