I routed the wire from the radio to the roof light. I removed the rubber from the door frame, and this gave me access to the A pillar (there is about 6-7mm of open space covered by the rubber door seal). Take care with the airbag, the wire must not block airbag deployment. I removed the sun visor and roof handle and I could lower the roof a bit and push the wire all the way to the center front dome light
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