sourse:

http://patents.globalspec.com/partnerContent/PatentDetail?docId=9878862854&SrchItem=1&frmqry=speaker%20connector&kqid=90194675&show=patents

An audio speaker configured for simple manual or automatic robotic insertion into an enclosure aperture so that it will be electrically connected to an audio signal transmission medium and retained within the enclosure. The speaker includes a latching mechanism and a pair of coplaner electrically conductive contact pads concentrically oriented and disposed on the back of the speaker. The pads are disposed so as to contact a pair of relatively fixed electrical terminals mounted on the enclosure, independent of any rotational orientation of the speaker.