How to properly loop through these external URLs to get them into the sitemap

I have filtered Urls that I would like to add to push into a sitemap. I am using one of the sitemap plugins, which has hooks to further modify it.

my code so far

// add to theme's functions.php
add_filter('bwp_gxs_external_pages', 'bwp_gxs_external_pages');
function bwp_gxs_external_pages($pages)
{
    return array(
        array('location' => home_url('www.example.com/used-cars/location/new-york/model/bmw'), 'lastmod' => '27/03/2017', 'frequency' => 'auto', 'priority' => '1.0'),
        array('location' => home_url('www.example.com/used-cars/location/los-angeles/model/aston-martin'), 'lastmod' => '27/03/2017', 'frequency' => 'auto', 'priority' => '0.8')
                array('location' => home_url('www.example.com/used-cars/model/mercedes-benz'), 'lastmod' => '27/03/2017', 'frequency' => 'auto', 'priority' => '0.8')
    );
}

So as you can see in my code that I have these kind of URLs www.example.com/used-cars/location/new-york/model/bmw & www.example.com/used-cars/model/mercedes-benz

So my issue is that, there are thousands of these URLs and I to push them all into this sitemap.

So my question is that, isn’t there a way to perhaps loop them over? than to insert them into the code one by one like so

array('location' => home_url('www.example.com/used-cars/model/aston-martin'), 'lastmod' => '27/03/2017', 'frequency' => 'auto', 'priority' => '0.8')