Nov 23, 2015 - 06:41 AM
SEO > SE URL Submission. For more details see Tutorial No. 35.1 SE URL Submission
You can submit the Sitemap index if you have more then 50K products. the sitemap index contains all the sitemaps generated for your website.
Simply put the SitemapGoogleIndex.aspx URL into your Google Webmaster Tools and Google will pick up all your sitemaps automatically