Phoenix Gold Phorum

I didnt want to clutter up my other threads (sorry Im such a post whore) but I removed this white thingy from the back of my Pioneer deck a few months ago. I cant find it now but it looked to be a security device that screwed into the back of the head unit. Is that what those things are or is that some kind of a ground block?

if it is what i think it is, it was a transport locking device used to prevent damage during shipping, otherwise I have no clue..

was it just a 1" or so long screw for the back?

The screw was about 3/4 '' if I recal and the whiter thing is about .5'' x 2 '' wide