Hey bud. I have access to a service info site, and I checked for the Suzuki Swift 2006 model. It wasn’t an option, so I looked at a Suzuki Aerio, even though I don’t know what that is. I also checked the same model year Aveo. Both showed that there were the typical 3 nuts on top of a macpherson strut. Is it possible the nuts are under the black collar you are seeing? I don’t want to give you bad info and have the strut explode in your face. Also, are these front or rear struts? I checked front, but I wouldn’t think it would make a difference. Overall, I would think the middle nut would be the one that holds the assembly together.