i did it today, they were all 13mm (if under the car looking up, so legs facing the front of car)
there is 2 bolts on the right side of PAS Pump (one noticeable, other just up from it)
and 1 bolt on the left of PAS Pump
loosen them, then get something to lever the pump so it goes towards the front of car, and then tighten up nuts, took me 5mins exactly (but i did have a ramp, so much easier)