Phrunt posted a pretty neat Clip he got from China. It works perfect for your Swing Arm. Especially if you have a Minelab Swing Arm that has no convenient way to store the Swing Arm if you don't want to use it.
I ordered a sample and it has my approval.
So I ordered 550 of them. Price $3.50 plus shipping in the U.S. Unfortunately depending on where you live shipping will probably be more than the clip.
Doc