Longtitude and Lat accroding to my TomTom:
Big Roundabout at entrance to Cda : N37.74505, W 1.37319
Polaris HO : N37.81537 W 0.93655
Banco Hispania / Cam Bank plus Lidl etc in Mazarron: N37.57214 W1.26709
Didn't save details for Thader shopping centre or Ikea as it is blatantly obvious from the main road as you pass Murcia. If you are coming from Alicante take the turning after the stadium that will be on your right. Coming from Cda take the turning as soon as you see Thader just of your right.
Hope that helps!
Good luck.