If the files to be transferred aren’t in the same /directory aka /path of ADB & Fastboot tool, additional /path information must be given so that they are transferred from ADB & Fastboot Tool.
/e/ documentation
Install /e/ on a LeEco Le 2 - “s2”
Installing /e/ from custom recovery
8.) Sideload the /e/ (e-0.7-n-*).zip package:
8.1) On the device (LeEco Le 2 X527), select “Advanced”, “ADB Sideload”, then swipe to begin sideload.
On the host machine (Arch Linux Notebook), sideload the package using:
8.2) $ adb sideload /**path**/**to**/e-0.7-n-202221541379-dev-s2.zip
https://ecloud.global/s/jgCBFPGDE96x8w5
9.) Once installation has finished, return to th WinTeam TWRP main menu, tap Reboot, and then System (see also images posting #27)