Audio bluetooth belt box help

[Quadan[501st]]

Ok, I am tinkering with an idea to turn one of my belt boxs into an audio controle box for my bucket's enviromental hearing. I have decided to go bluetooth but all I am seeing is that the BT headsets sync to a device. Have any of you had dealing with a wireless headset that plugs into an Audio jack rather then one that syncs to a device? as that is What I am thinking to use.

[Quadan[501st]]

Not good with posting picks but I have links.

 

Wireing map

---------

Edited April 1, 2022 by gmrhodes13
link removed no longer working