Thats the right line.
If you left the check valve on the line coming off the intake i would just plug the open end of the check valve with a rubber vacuum cap if you have one. If not if you have a chunk of vacuum line that fits the open side of the check valve cut a short peice of it and put a screw in one end of the hose (a screw that is slightly bigger than the opening in the hose, this will plug it off) and then attach that to the open end of the check valve. get it?
I know this is sort of crude but it might help.