I think that someone has the complete download for that car from Erwin SEAT and has placed a link to where they hold it in a posting in this forum, I certainly downloaded it from there - and you can find all you need on that I think, not quite as straight forward as a wiring diagram, but pages of what VW Group call "current flow" diagrams.
 
Most of the wiring diagrams are held in the file called basic equipment. We aware that these diagrams apply for left hand vehicles. While most of the wiring is the same, some parts are side specific (such as heated seat power outputs for an example) and it won't tell you this.