J11 is on both boards. It is the 3pin black and white wire that plugs in directly behind the intake fans. This J11 wire runs into a small board next to the power supplies; a board located in the side compartment with the power supplies. One of my J11 plugs had the black rubber crap over it to hold the plug in so yours might be covered but its there. Here is the PDF they sent me. I have not tried pressing the reset button and I dont hear any clicking. I have been keeping this board powered off since its not working. Not need to have power running to it. I do have two other units running also below this one. I noticed there is a reset button on the outside front center top of the case and each internal board also has a button but I dont know what this one does. As far as one board having a jumper and one not I think this is just to signify and master and slave board
http://i.imgur.com/5rb2Jen.png