The following units were in Austria at the end of the war in Europe.
1st SS Pz Div LAH
3rd SS Pz Div Totenkopf
5th SS Pz Div Viking
12th SS Pz Div Hitler Jugend
16th SS Pz Gren Div RFSS
These units ended the war fighting in Austria - most of them being used in the Battle for Vienna.
Other SS units such as the 9th SS Div Hohenstaufen and the SS Cav div Florian Geyer had large numbers of men that made their way westward after the war to give themselves up to either US or British forces - but this they did further to the east than Salzburg.
I am certain that many of them, in ones and twos, tried to make their own way home avoiding the whole POW process - but for these men who were making their way from Hungary, this would have been at least a week or two after May 8.
I hope this was of some help.
Tim