I want to fit speakers in my rear doors, I already have the ones next to the handles but they are not wired , what size speakers would I need and would they be easy to wire up, are there any plugs for doing this on the loom

I was gonna start the same thread. My Octavia 2010 only have speakers in the front doors. I was wondering if the cable are there and I only need to buy the speakers? Or I will need to wire it up to the back of the stereo. Got the Swing system.