Apple Watch 3rd generation cellular model Taptic Engine replacement.

Hi. It is using the 3rd generation 42mm cellular model of the Apple Watch.  I'm trying to replace the tactical engine, but the gps model and the cellular model are disassembled differently, so I can't replace it.  Can't you figure out how to replace it?  Even if I search YouTube, I can't fix it because there is no teardown for the cellular model.