not sure what more you want, it is literally what I wrote above.
1) Create Dynamic targetGroup and setup so your designated Server accounts are listed
2) setup a Scheduled Job selecting the targetGroup and set to updatePassword and "Use Same Password for All"
a) OPTION 1, set to "Generate Password = Yes"
B) OPTION 2, set to "Generate Password = No", and then enter and confirm your injected password.
3) once job is run, verify all targetAccounts were rotated
4) go to any of the targetAccounts to view the password, and this will be the same for all devices in the selected group
let me know if you have any other questions?