使用.htaccess - opencart项目重写URL

I'm looking for a solution for below URL rewrite rule

URL : http://localhost/mysite/abc/index.php?route=product/category&path=1

this has to be rewritten to

http://localhost/mysite/index.php?route=product/category&path=1&store=abc

I have tried with the following

RewriteRule ^([^/]*)/([^/]*)$ $2&store=$1 [L]

but it ended up in /mysite/index.php&store=abc

couldn't get the full $2