Trackpad replacement, different fitment.

So the trackpad on my 2012 Unibody 15" MacBook Pro stopped working. Im going to replace the trackpad, and I have y old 2012 13" Unibody laying around and want to use that trackpad, I took them apart, and the trackpads are exactly the same size, only difference is ribbon cable. Can I just swap the ribbon cable from the 15" to the 13" trackpad and use that? Everywhere I look it says trackpads don't fit. Don't want to spend on a new one when I have another laptop laying around I can salvage parts of.