@D-Tuned
Given that you are writing for a "human" choir, it would be best to use staff notation which will be familiar to them. The normal SATB convention[1] would be to have the soprano and alto parts on a shared treble clef, with the soprano part using upward stems, and the alto part using downward stems. The tenor and alto parts would normally be presented on a shared bass clef, with the tenor part using upward stems and the bass part using downward ones. E.g., from the Welsh hymn tune Hyfrydol:
- Screenshot_2023-08-27_21-39-23.png (50.77 KiB) Viewed 1889 times
Note that, as in this example, the stem direction rules aren't always strictly followed.
The alto clef and tenor clefs used in your example are normally only used for certain instruments (violas for the alto clef, I think bassoon and cello for the tenor clef). I can pretty well guarantee that no human alto singers would want to read their part in the alto clef, nor any human tenors in the tenor clef.
[1] https://en.wikipedia.org/wiki/SATB#Notation