I am an idiot. I was talking chest catheters and you asked about PD catheters. *Bangs hand onto forehead!* Dummy. Read the damned post! What a dummy I am! Sorry.
I was told they usually choose depending on if you are right or left handed. So if you are right handed they will put it in on the left, you'll be able to keep a firm hold your catheter directly in front of your body with your left hand and unscrew and attach the dialysis tubing with your dominant hand. It works for me. Good luck.