You need to show in addition to what you have been told with your admission package:
1.     Colour Copy of your admission letter (Zulassungsschreiben)
2.     Colour Copy of your passport (for Non-EU students) / national ID (for EU citizens)
3.     Proof of sufficient health insurance
4.     Paying in slip as proof of having transferred the semester fee
5.     Non-EU students: Residence permit (Aufenthaltstitel)
6.     biometric, passport-sized photo (for student ID)
More informations can be found under the following link:
https://www.hs-anhalt.de/en/study/paths-to-university/enrollment.html