honestly,i did the same,had it in bits,the light was getting in the way and i could not get my head round how it went together,i tried for hours.i ended up getting an ex ford mechanic to do it.2 bloody minutes and it was done,he used a pair of pipe grips and a piece of 15mm pipe with the end flattened to push the clip in and maybe a cable tie to hold it together.good luck but bribe somebody to do it,far easier!