Water cooler line/lines

Hi guys. New here.

I just picked up a PowerPro (PowerMaster) 256.
It came with a water cooled tig gun but I only have one line left over. It has a white tag on the end.
Do I need to pull the one out of the main connection on the right?

http://home.cogeco.ca/~fileme/pics/256water.jpg

I plan on adding water in the near future.

For water cooling, should there not be 2 lines. A line in and a return to the cooler?



Thanks

You should have an additional line in fact. One is for gas, and two for water. The white tag should have some indication as to what line it is. The side line should be the return for the water. There should be another, presumably the one you have in your hand, that is the input side. And a separate one altogether for argon. How many do you have total?

Thanks for the reply

I found it. It was a short one from the plug. It was tucked in the main cable jacket. LOL

Thanks