Only one lower pipe and its on the right hand side, looking at the car. Fill the header, squeeze the pipes, keep filling then run the car and squeeze the pipe. You'll find yourself then putting another few hundred ml's over the next few runs out.
If you don't mind me asking, I presume someone else is fitting your turbo?? As if you need ask these questions your going to have a whole lotta fund trying to fit a turbo!! Their a pain in the arse at the best of times, not to mention this priming the oil system, getting out pressure and just trying to get the old one off.