force a mirror in yast

Don’t know if it’s the right place here,
but i searched everywhere how to force yast to use a specific mirror when sync’ with repositeries.
As for now, the mirror Yast always select for me is located in south africa and it is so slowwwww (3 min to download 37kb).

So please can someone tell me where to configure mirror (i’ve seen such feature in synaptic for example)?

Add one of these to Yast –> Software Repositories
And at the same time switch off the corresponding auto-locating version therein

Mirrors Released Version - openSUSE