Reload more than 1 div at one time. (not only #content)

I know i can change #content to something else in the settings.
but can i add another div that i want to be updated by ajax at the same time as the default #content?

say my main navigation in the header with the id #main-nav
can i just add the id of this div in the settings beside #content or do i have to hack the plugin files?

https://wordpress.org/plugins/advanced-ajax-page-loader/