I hotglued four magnets on to the housing and to avoid metal-on-metal scratching I taped some duct tape over the magnets.
![Hotglued magnets](http://bluesaab-forum.90.s1.nabble.com/file/n1061/20170402_162040.jpg)
I've access to the box underneath the left hand side storage bin in the trunk.
![Out of sight, out of mind](http://bluesaab-forum.90.s1.nabble.com/file/n1061/20170402_192849.jpg)
I've used it for several days and so far it seems to stay in place and the BlueSaab works as normal :-)