I recently bought a pair of electric mirrors with loom thinking that all electric mirrors were also heated mirrors. I may have been wrong about that.
As the mirror glass was not brilliant, I decided to get some new glass before fitting them and the wide-angle, heated mirror glass arrived this morning. I've popped off the old mirrors only to find that there do not appear to be any connections for cables which leads me to my conclusion above

. I think I was slightly fooled by the three spring 'contacts' positioned around the edge, what are they for?
Does anyone know the cable colours which connect to the heated mirrors and should I be able to patch in the non-existent connectors for the new glass?
Thanks
Graham