I recently got a nice office chair for Christmas with heated massage functionality and it uses a barrel plug to power it but I have to be super careful to not pull it or damage the barrel connector in any way. I wish there was a magnet conector for these things in case of a yank pull and was wondering if anyone had heard of some adapter like the one I pictured above.
I'd extend the cord and add a break-away somewhere else (strongly attached), removing the strain point from the barrel.
You want the strain in-line with the cord and strain-release connector, whatever you end up using.
Do you have any examples of what break always I should look for?