I own several females. As the others have said, the owners of the females will contact you if they think your male has something to offer!
I have bred to dogs who have been in World level competitions, National level winners, SAR certified dogs, Police K9s, and dogs no one has heard of! All males had something about their credentials, their pedigrees, their personalities that complemented my female and which I thought would help bring the litter closer to the Ideal GSD as described to in the GSD standard. Every male I have used has passed hip and elbow requirements either in Germany or through OFA or what ever country he came from.
If you want people to breed to your male, other than backyard breeders looking to make a few bucks producing pets of unknown potential caliber in health and temperament, then you need to get out there and have him seen doing things that will attract the owners of females.
Csabre Sch1, Hexe Sch2, SG Bengal, Lynx, Komet, Kira HGH & Kougar v Wolfstraum ~ Ziberia IPO1 ~ ATB Basha, Kougar & Kyra, Fenja, Sch3s, Cito, Sch2, Danger RH & Alice Sch1s ~Kelsey