In kibana code, where can i change the request destination url?

by default, kibana send data search request by url: http://x.x.x.x:5601/elasticsearch/_msearch

but i want to change the request url, where can i modify the source code?

Thanks!

you can get the source code at https://github.com/elastic/kibana

repository contains file CONTRIBUTING.md which contains some basic documentation to help you get started.

regards, Peter