Time input boolean by switches in homekit

Hey Guys,

i would like to adjust my light wake alarm within homekit.
Since there is no time input for homekit it thought i might use switches instead.

Example:

I would like to be able to set the following times by using the switches:

5…
6:00, 6:15, 6:30, 6:45
7…

Ho can i transfer this into my time input for the alarm?

Found this but still couldn’t figure it out.