Looking from the side, it appears the pegs (mounting holes) is 9 - 5.7 = 3.3mm from the front. And 5.7mm from the back.
From the front it isn't that clear. But it does suggest both at centred 10mm from the centre. So, if the connector is 22mm wide. Then the mounting holes are at 1mm and 21mm from the left or right edge.
Also note one peg is 0.9mm diameter, the other is 1.4. SO the gap from the left to smallest peg is 1 - (0.9/2) = 1 - 0.45 = 0.55mm. And from the right edge to peg = 1 - (1.4/2) = 1 - 0.7 = 0.3mm.
If you're adding this part to your PCB cad package, then as a check, best to print off the layout and check with a real connector.