The line '#uploaded files' does not exist in .htaccess file

Hello and Merry Christmas everyone.
The line '#uploaded files' does not exist in the .haccess file.
Can I manually add the line to the file?
I am using W3 Total cache - can I add the line just after where the W3 Total Cache statement ends? See below for clarity

# END W3TC Page Cache core
# BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

#uploaded files
RewriteRule ^(.*/)?sitemap.xml wp-content/sitemap.php [L]

Thank you for your support, The Fixer