Meredith
riding reluctantly into the sunset
yesThat looks interesting, Meredith... So you only have it attached one side so it's a strap rather than a handle...?
A leather dog collar or similar strap, loop it through the ring on one side of the breastplate wither strap and hold it with your rein. I use different fingers for the reins and the collar.
You could attach a single strap if a loop isn’t satisfactory.