At present, DME welcome area is on Side A of the airport, which is the side you will be arriving on. So...when you get off the tram from your gate area, you will enter the 'center' of the airport. Just stay on Side A, go all the way down to the bottom level. You will arrive on level 3, baggage claim is on level 2 and the transportation desks are on level 1. So, you wil be looking for level 1.
As of Oct 1 (or in that area) DME will relocate to Side B....same scenario though, on level 1.