Step 12: Mount
For our purposes, the flat side of the cabinet handle will be considered the front.
Pass the red and black wires of the piezo through the hole you just drilled from front to back.
Epoxy the piezo to the cabinet handle such that the flat side of the piezo is facing out.
Be careful to leave a tiny bit of space between the cabinet handle and the solder points on the piezo (just in case the handle is conductive).