Just finished installing mine, many thanks to all those who contributed to this
guide as it proved very helpful. I found mounting the GPS Antenna between the air vents and passenger air bag seems to work:
Gets good reception and it picked up my location straight away. Some people have said you have to drive for a mile before they realise where you are but I didn't have that issue.
I also found that as my car is a pre-facelift you need to adjust the quadlock connector and splice in the SAFE Pin. This took me a while and a lot of frustration!
Finally if anyone needs to get one of these units decoding, I found a guy in Portugal who can do it for €10. He just needs the model number, part number and serial from the
sticker on side. None of the Chinese sellers on eBay offering decoding could do a SEAT unit. PM me if you need the details.