i have a 92 mazda protege and the ac was running cool. one day in the highway i heard a noise like loosing air and felt the ac is blowing warm air. i pull over and check the engine and there is a lot of freon in the shielding under the compressor. i took it to the mechanic and raise it and found out that there is a hole under the compressor. but the thing is there is a thread inside of it so i think there was something there before. i found a picture online and kept thinking that was i'm looking for but i don't know where to get it. here is the picture. please let me know what it is and where can i get it.
http://img.auctiva.com/imgdata/2/8/6/1/9/2/webimg/291851932_o.jpg?nc=396
http://img.auctiva.com/imgdata/2/8/6/1/9/2/webimg/291851922_o.jpg
http://img.auctiva.com/imgdata/2/8/6/1/9/2/webimg/291851932_o.jpg?nc=396
http://img.auctiva.com/imgdata/2/8/6/1/9/2/webimg/291851922_o.jpg
