Renault Clio parcel shelf speakers fitting and info

Hello,



I'm an owner of a Renault Clio 1.2 Dynamique 04 plate, a relative of mine has recently sold his clio and gave me his speakers which are to be fitted onto the parcel shelf on my car.

the speakers are Fusion Encounter EN-FR693 6X9" 3 way speaker 260W



The information I am seeking is

would I benefit from a subwoofer/amp?



how would I fit them?

I've seen some people say to use the wires from the speakers next to the back seats, other people say to get a new wire for them

I do have a Pioneer radio fitted if it helps



thanks