I'm not sure, but I suspect you need another physical button (a green one probably) that is wired into one of the inputs on your BOB.
Then go into Config > Ports & Pins > Input Signals (tab) and set the green button to OEM trig #1.
Then go into Config > System Hotkeys and set OEM Trigger #1 to "1021" (which I think is the code for "Reset"). You can find a list of codes here.
Like I said, I'm guessing this is how it's done, but since I've never done it (or tried) I can't be sure.