Here is a pic I circled J11. If you dont have that maybe your version of the boards is different. These boards are printed with model numbers and revisions
I have GSA CARD ASSY: COIN-500-013 REV.B. I had a leak also, it was a small crack in the hose for me. You should be able to locate that leak and fix it just how I did
http://i.imgur.com/zHI53vg.jpg