in TWRP: Install → Install Image → vendor.img → Select target partition?
Now I get to choose:
System image
boot
recovery
vendor image
carrier configs
Don’t know which one, best guess would be vendor (???)
In your guide on " /[HOWTO] install /e/ on a Samsung device from a GNU/Linux PC successfully" you mentioned that
twrp version 3.4.0-0 is designed for android 10/Q don’t choose it
currently it’s running 3.2.3-0, can I even install the /e/ Q with that?