No no no..... do NOT do this mod.
Iv done the W8 mod, and I would STRONGLY recommend no one with cupra/boc try this mod (dont know about other models but i suspect they are the same). All the guides that say its plug and play are wrong. It was a massive pain in the arse. The light is a completely different size and profile. It took me a full day, i had to drill new holes, make and fit wooden holders and supports in the tiny space where the old light used to be, cut things, file things down, and mess about for ages with it getting it to sit right..... trust me its just really not worth the effort. I mean yeh it looks good and everything, but if I had known it was going to be such a nightmare I would not have taken it on.