Bu da yabancı bir sitede yapılan uygulama
Here's what an Insignia shark fin arrives like (part number 13241275 retail price £41.15 + VAT). The connector is a fakra which is different to the other Vauxhall ones.
Also the mount through the roof is different. You need to remove the plastic part around the mount and dremmel off the fins around the mount, it will become obvious when you have one. TBH I would start with the larger one at the front and then take the ones in the corner a little at a time. The hole in the roof is square and keeping the corner ones partly in could stop it rotating as you do it up.
Next you need to dissasemble both of the aerials.
You then need to de-solder the cable from the original base and re-solder it to the sharkfin to get this.
Then just fit it to the car, no need to over tighten or the legs of the metal stool may deform the roof. You then get this.