Screen touch (home) button replacement?

When I see LCD screens for the Surface Pro 3 such as the link posted below)

They all have a circular hole where the button should be. Is it possible to change out the touch button? because if so the ifixit disassembly does not show it and quite frankly I thought it was all one piece anyway so is this LCD wrong because all the pictures show this.

Many thanks!

(http://www.ebay.co.uk/itm/New-LCD-Touch-...)