Im glad you asked.
I did not take a pic of it and it would require me to take the tower off at this point to do so so you will have to use your imagination here:
I took a piece of 2 1/2" pvc pipe, as the hole in the fridge and bar top was 2 1/2", and placed inside of it copper pipe. the copper I had was 3/4", perfect for sliding beer line inside of that. The PVC sat flush with the inner side of the fridge where the hole was and almost to the top of the tower where the lines came out of the shank. Inside the PVC i placed the copper and had it stick out on the bottom or fridge side of the PVC about 2.5 inches. This is to get some direct contact of cold air on the copper in the hopes it would conduct cool air up the lines that were inside of the copper. it worked! in order to seat the copper inside the PVC I used the expanding foam and filled that bad boy up, let it sit and bang, seated copper tubes.
I then used some cheap "L" shaped braces that come with cheap blinds and screwed them to the PVC so that they would rest on the top of the fridge between it and the bar top.
All around the opening where the PVC meets the interior of the fridge i put some expandable foam to keep the cold air in.
So far it works great!