Photo of attachment 'lock' on Tree or Gecko?

[Jamington2004]

Would anyone be kind enough to provide a close up photo of the attachment 'lock' (for lack of a better word) on either the Tree or the Gecko to the Phantom's little metal bolt in the center of the base?  I am considering making a custom base for the Phantom and will share here if I do. 

Thanks!

Just been to Harrods and took this for you of the gecko plate 

Looks like a spring loaded clamp at the back and then a hole for the phantoms hook to slide into on the front