This link is available from Lenovo with video downloads for assembly and disassembly of the TPT. This link, which was posted in the Lenovo forum, is direct from Lenovo, so they may decide to remove public access at anytime. http://lenovo.vo.llnwd.net/o16/TP_tablet/player.html
When the site opens, look in the left side menu and click on "FRU Service Videos" and then on "FRU Service: Full System Disassembly and Assembly". You can then download the videos or watch them online.