Strange metal box

Hi,

I have a K12 convertable. Whilst checking the underneath I found a rectangular metal box mounted the to the end of the rear chassis member on the drivers side. On its underside it has two pillars protruding through grommets. The two pillars are joined together by a bridging strap.

Does anyone have any idea what purpose this box serves.

Many thanks.
 
20160413_161735.jpg
Picture of mystery box at end of chassis drivers side.
 
Back
Top