Cats will not **** where they eat. Put a bowl of food in the area
where he has been ****ing. Right now, the fact that he keeps using
this area shows that he sees it as a toilet. With the presence of
food he will be forced to see it as a dinnertable.

Also use cleaning products to try to remove the **** smell, and maybe
put out another litterbox somewhere--he may think it's too far to walk
to the other one and just wants a potty closer to that location.
Especially at his age. A more convenient second litterbox may be a
more appealing alternative than ****ing at the "new table".

--Fil