Help with front speakers

Hi all, just got a 197 which has an aftermarket JVC HU already in.
When I play the stereo the sound only comes from the front tweeters and nothing from the main door speakers.

Any advice on what to check on please
 
Some of the Clio's don't have rear speakers fitted behind the grills more likely pull the stereo and hope that some tool has not cut the loom instead of buying an adapter harness for the radio most likely the wiring behind the radio since it's aftermarket someone might have pulled the aftermarket phone kit when selling and not fixed it afterwards.
 
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