add an anchor to the search url

Hi there,
is there a was to add a an anchor at the end of the search url?
f. i.
https://domain.de/pagename/?_sft_filterstring=national
gets
https://domain.de/pagename/?_sft_filterstring=national#anchor ?

The Scroll Window to in register Display Results isn’t working. Maybe its because I use a custom query with an accordion function in the results.
An using the Ajax Container turns the accordion function off. So I need a simple way to add the anchor to the search url.
Hope that it is possible. =)
Kind regards
Sandra