Yes, you are right, the top photo is of the passenger seat and see how the part is squashing the leather and padding. If I just fasten this new part (even with the backing) on my driver's seat, it will not have that compressed padding look - the leather will hang flat with the strip stuck on top. There must be something else in there such as velcro or cords - there is nothing on the web showing the inside.
Next plan is to go in from behind - looks pretty straight forward...
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