I just put some refrigerant into my a/c compressor. I drove my car around to make sure everything is going smoothly. On my way back home, my idle RPM climps to 1500 RPM. I get home and check under the hood and there's a vacuum line detached next to the compressor. I need to know where the other end of this vacuum line ran. Attached is a picture from the TSRM that I cropped and circled the connection in question. Thanks community in advance for the help.