Oval sound proofing pads ??

Got a set of sound proofing pads out of a wreck about 5 years ago. See the pic below. They go up the back either side of the window between the two panel skins to block off the noise from the engine coming into the cabin. They came out of the wreck easy enough, but I can not seem to get them up far enough into the Grey Oval. Any bright ideas on how to push these f**kers up.

Can you tie a cord to one end and pull them through? At least that way they would be pulling lengthways and getting thinner, rather than getting fatter as you push them. 🙂