Use same URL slug as copied source | CyberSEO Pro | Support Forum

I think you just can't. The post slug is an internal WordPress-specific thing, which can be made of post title, but may be different. Since it's a part of the imported post's URL, you my try to get it via PHP code:

Exact it from the source post link, which is stored in $post['link']

Save it as $post['post_name'], which will be a slug for the newly generated post.

Please read how to write custom PHP snippets here: https://www.cyberseo.net/content-syndicator/#php-code