Looking to check my a/c out, but am having problems finding the low side hook up. I found hi side easy enough. I found a hook up on the tank itself next to the firewall. That is not the correct one right? First time doing this so want to make sure I am doing it correctly.
I would appreciate any and all help in this matter.
Thanks alot.

 

The low side hook up is on the accumulator (the tank by the firewall). There should be a cap on it.

 

The size of the low side hook up and the high side hook up are different. You can't get it wrong.