Clean install for whatever it is. If there is also one on other side could it be for heated seats if you do not have in center stack (or even just for driver seat).
Check fuse panel for any extra wires (though if they went to such clean measures for switch install, they likely did same for the power lead). Those style switches are usually just compression fit from front. You might try gently prying out but that'll likely just lead to a pair of wires which could go anywhere in the console.
Could be a quick kill switch for radar or laser 'blinder'. As suggested, turn it on and see if car starts or seats get warm. Also, see if it draws anything measurable, turn car on (do not start) and take reading across battery terminals w/ it off, then on.
Good luck
Hybrid Mode
