Did mine a while ago, you cant really see much without removing o/s headlight.
The one I fixed came from the top of the pump and into a branch which is bolted to the rad, common one to go as if not secured will rub against the chassis. The other pipe going to the condessor is clamped in three places.
As its empty this you can do yourself, save yourself a bucket load of money and then have it recharged £44 Kwik-fit. I was quoted £250+vat without parts or recharging.
Parts are expensive from Vaux and found the one I needed from vauxhallworldparts 2/3rds off