How to link images of one WP site to another WP site?

Move your images into a Content Delivery Network (CDN) so they are external to the site. Then you can pull them into any number of sites.

Look at something like Amazon S3 or Cloudflare.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)