I posted this in the general section in response to some having issues with backing a disconnected surge brake trailer w/A60 actuator. It will get more practical use here.
Insert the UFP lock out into the slot and place any small substantial magnet (off an old speaker or other) over it to hold in place. We all have a couple of these magnets stuck to a tool box or laying around.
Remove when done and stick magnet to tounge. No cost. No tape. No clamp. No BS. And it's unnoticeable so no one will steal it. The tounge lock pin and the lock out are both attached to a small SS cable on the actuator right where you need them.