This is how it's already done on Devuan. https://www.devuan.org/os/init-freedom https://www.devuan.org/os/init-freedom https://www.devuan.org/os/documentation

This is how it's already done on Devuan. https://www.devuan.org/os/init-freedom https://www.devuan.org/os/init-freedom https://www.devuan.org/os/documentation/install-guides/chimaera/img/025initchoice.png https://www.devuan.org/os/documentation/install-guides/chima... (older screenshot)