Hopefully someone can help, i got this Alpine Headunit, im not great with audio stuff and im struggling to work out what all the plugs are for
I've taken pics so hopefully someone can help
This one, im pretty sure one of these is for an AUX adapter which i need to buy, the plug on the left is on a short cable from the back of the HU

I know one pair of these are for plugging my sub/amp into, not sure which ones though?

and this one was already in the car tucked away in the dash, it doesnt seem to do anything afaik, just wondering what its for?

Cheers