Locate the factory drilled holes on each side of the underside of the drafting table top.
Slide a metal collar over the end of each of the screws -- both included with the table top -- to create mounting studs.
Twist the threaded end of one of the screws into the pre-drilled hole in one corner of the table top. Tighten the screw with a Phillips screwdriver. Install the remaining screw and collar into the pre-drilled hole on the opposite end of the table top in the same fashion.
Locate the six holes -- three in front and three at the rear -- on each table top support bracket on each side of the drawing table leg assembly. Push a rubber plug into a hole on each bracket closest to where you will be seated when using the table.
Turn the table top over so that the top is facing upwards. Lift the table top and lower it while simultaneously guiding the two mounting studs installed at the rear of the underside of the top into one of the three holes on each support bracket farthest from the seating position. Ensure each stud is lowered into the same hole in each bracket.
Let the front of the table top rest on the rubber plugs installed at the front of the support brackets.