Mike, use the same wire as the safety strap, make a loop a couple inches in diameter and join it with a couple crimps. I also use some shrink wrap on mine.
Loop it over the feet of your reel, then put the reel in the seat of the rod as always. Just be sure the loop is small enough that it can't fit over the top of the reel and come off.
It works really well and with the safety strap 4 or 5 feet long it doesn't get in the way and after you pick the rod up outta the holder you can simply unhook it.