The connections are behind the C pillar trims. I can't comment on specifics of taking that out of a PF, but in the FL there is a T30 bolt hiding behind the front A-pillar trim, and then another one behind the coat hook (which the PF may not have). Once those are out the actual C pillar part is held in by spring clips which can be prised out. Take care not to kink the trim panel - I find that once the top is loose its best to try and slide an arm down behind it, popping the clips out as you go.
The FL has some stupid stuff going on for the roof airbags which I don't think will apply to the PF.
There may be some antenna amplifiers also connected to the heating element, depending on the spec.
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