Move the cardboard so it blocks the left bulb, so only the right bulb is shining on the wall. The top of the right low beam should be even with the mark you made for the left low beam. Move the cardboard back and forth between the bulbs to verify that the low beams are at the same height. On high beam, the two hotspots should line up vertically. With the lights on high beam, note the position of the beams' hot spots on the wall in relation to the mark you made in step 5 above.
Most owners complain about their low beams being too low on the roadway.
You can watch the high beam hot spot being lowered on the wall in relation to the mark you made. Take a test ride. Get out on a dark street, and adjust the high beams using the dash knob until you like what you can see. Then switch to low beam and see how that looks. Repeat these steps until you get the low beam pattern you want.