Hacks PW4 jailbreaked not starting file with .sh extension

[tebra]

Hello,
M’y Kindle PaperWhite 4 with FW 5.16.10.0.1 is jailbreaked.
I can start KUAL and Koreader from Library with KUAL.kual and KOReader.kol placed in /mnt/us/documents/
But I can’t see/start files with .sh extension placed in that directory.
Every files in that directory are owned by root:root
For exemple I installed kwordle. I can start the app kwordle.sh with kterm but the app startup don’t show in Library.

Can anybody tell me how to fix that?

PS: sorry for my bad english