You can collect the keys at the DUWO office. Please bring valid proof of identity (passport or ID card) with you.
On the agreed date (the start date of your contract) your room is available from 1 pm onward. If you arrive earlier or outside office hours, you should arrange for a place to sleep yourself.
Does the start date of your tenancy agreement happen to be on the weekend or a public holiday? Then you can collect your key on the next workday after 1 pm.