Wiring rear speakers to HU

[aucky]

Right..
I've recently installed a sony headunit and im looking to install some cheap coaxials in the back.
I have a poverty spec clio so there are currently no rear speakers and presumably no wires there.
Could i wire them to a set of pre-outs? or does it have to go to one of those block connectors?

Thanks

 

[MT AUDIO]

pre-outs are for amps,wire it to the block.the purple and green coming from your sony unit will be the rear speakers