materials from GH GECo to Ecotect

Hi,

I need to understand in which order do I need to input the material component. Should it be connected to the export mesh component or after this one. I think the simplest question should be : How can I tell Ecotect what is the material of the Geo being exportedé (i.e.: calculate the insolation falling in to a room through a lowE glass pane).

Thank you