jazzy - 2 ways to stop the jack swinging round...
1. Don't plug it in when your bass is on the stand - less change of someone tripping over it too.
2. Trap the cable under your strap before you plug it in. This will keep your jack pointing towards the strap button.
 
Graeme

Changed my mind about comment.
 
(Message edited by jazzyvee on May 02, 2012)