Can someone tell me which one of these ports are the ac charging port.

 

It appears that you may have a dual AC , do you have a rear AC system?
If so both ports may be charging ports... the cold side is typically where the charge is added and I believe its the smaller of the two ports.... if you are using a auto store recharge can it should only fit on the correct port...

 

Yes I have a rear ac system. So if the auto store recharge can fits on both portsthen they both need freon?

 

Lets back up a little bit...
Why do you need to know which port is the recharge port, is the AC working but cooling?
Its possible to add too much Freon to the system and over charge it...
If the system is working but not getting cool enough it may need a charge, if its not working at all there may be more going on like a blown fuse, or bad pressure switch...

 

In order to determine if it has enough freon, you need to put a set of gauges on it and check the pressures.