I have found a site that holds a lot of Mazda accessory fitting pdfs. From what I've seen they contain instructions on removing much of the interior trim. For example GENUINE Wireless Charger INSTALLATION INSTRUCTIONS covers (LHD) removal of footwell trim, fascia either side of instrument cluster and centre console including removal of auto gearbox knob. I wonder if the documented +ve (3Amp) connection is an ignition switched power source within the passenger compartment and therefore of relevance to dash cam fitting - a lot of work when a permanent 12v supply is available at the centre console accessory socket. Another one that caught my eye is INSTALLATION INSTRUCTIONS ROOF SIDE RAILS . I located the pdfs with Google searches such as "site:https://sep.yimg.com cx-30" and "site:https://sep.yimg.com mazda"