Understanding connector footprint on PCB
The oblong holes are for solder tabs, which help anchor the connector to the PCB. They are plated through-holes. The 2-0.50 probably means 2x 0.50 width (there are two solder tabs, and each hole is 0.5mm wide). The dimensions of the holes and pads are called out in the drawing -- 0.50mm wide by 1.30mm long. The outer "ring" might be for the pad (the previous dimensions were for the hole itself). It looks very narrow though, I would make the solder pad as wide as you possibly can without creating clearance problems between them and your other pads. Keep the hole the same size though.