If I remember correctly, there were a series of spot welds. It's interesting that from Dodge to Plymouth, and one year later, that the channel is not used. Unless a previous owner of your '37 Dodge took them out. I feel like a total dip____ for thinking I had to remove the channel along with the old rubber in order to replace the weatherstripping. I was able to pound the channel back in somewhat, but not completely. Lesson learned. Didn't make that mistake on the second door.