The slavic were the "saqaliba", right?
In my city -Zaragoza- there were berbers, confirmed by archaeology and toponyms. There is a neighbourhood outside the city wich was inhabited since X century. Its name, Monzalbarba (Manzil Barbar), explains its ethnical origin.
anyway the important moors were berber because moorish architecture resembles Maghreb's architecture and that type of architecture looks nothing like pre-al-andalus iberian architecture because that type of art can't come from the mind of a western European