On mine I took some spare hose and vice grips. I put the hose on the serrated grippers and then pinched the hose to the intercooler underneath the overflow tank. I used a 3/4 inch pipe plug (not positive of the size) and clamped it in with a hose clamp. Mine starts seeping every now and again so I believe something smooth would work better. You may come up with something better, but my way worked with what I had in the toolbox.

Les