Help me pls to combine split pane & tabs ionic4

Can you help me please to combine ion-tabs inside split pane, and verify is my routes are corrects please.
i do some try and test but i don’t understand how to configure correctly routes and router-outlet

you can try on stackblitz :
https://stackblitz.com/github/Celtiore/ionic4-angular-tests-RouterLink
or github :

thanks you