Change of speakers and possibility of amplifying Columbus in Skoda Superb MKIII

Hello, I am looking to update the sound equipment of my Superb MKIII, I want to change the speakers and the tweeters but I believe the Columbus equipment only has 4x 10 watt of power.

I have thought about putting the ALPINE KTP-445A Amplifier, but I don't know how to connect it to the OEM radio since it comes with a quadlock connector, I don't know if there is any cable to make a "plug & play".

https://www.alpine.es/p/Products/add-on-amplifier3597/ktp-445a

As for the speakers I had thought of Focal - RSE 165 with separate crossover, but I don't want to get too complicated and I have seen these Alpine SXE-1750S with built-in crossover.

https://www.focal.com/es/car-audio/soluciones-kits-car-audio/performance/auditor/kits-altavoces-vias-separadas/rse-165

https://www.alpine.es/p/Products/SingleView/SXE-1750S

https://www.alpine.es/p/Products/custom-fit-speakers39/sxe-1725s

I do not know if in the rear doors the Superb comes with the 2 separate tracks ...

As I have read, if I can not put the amplifier, the best speakers for low power are the ones that have the most sensitivity, hence the Alpine. I want to complicate myself as little as possible, because the speakers already have to be adapted and I also want to soundproof doors, wheel arches, boot ...

Any help is welcome.

Thanks.