How to refill refrigerant.

When we replaced an exploded engine on my kids 2011 prius, i asked my son to disconnect the ac compressor from the engine while I worked on engine bottom bolts. Suddenly I hear a shhh sounds, which I immediately understood he was disconnecting one of the hoses from the compressor so I told him to tight it back quickly. It was like 3 to 5 seconds so not so much refrigerant escaped. Now that everything else is working fine, I decided to check what to do about the ac. It is still cooling the cabin, but the air is not as cold as before and it takes much longer. I Checked the manual posted here to troubleshoot it, and there is bubbles when running as indication of low level of refrigerant. Too much money expended already on the car, even we just spent on spare parts, so trying to figure out if there is a cheap way to refill the amount of refrigerant escaped without the need of vacuum. By the way, I noticed the ports high and low are females, so normal recharge cans with a hose uses female connectors. And I haven't found a male adapter to buy. If there is not an economical way to fix this, they will have to drive it is under current hot Texas summer. So any good intended orientation will be appreciated.