Need help with ac pump connections

While replacing the power steering belt for my 5vzfe I had move the ac pump connection to get to the tensioner for the belt. I thought I could crack the bolt just enough to move the ac pump connection out of the way to get to the tensioner. Unfortunately it began to shoot out ac and I tried to tighten down the bolt that I just cracked loose but couldn’t get the connection to stop leaking. My question is is there suppose to be an O ring here between the connection from the ac pump?

 

Yes an o-ring goes there. One of these will work:

 

You’ll need to pull a vacuum and then refill the proper ac refrigerant