change Thumbnail-Link (post-url) Blog SS 7.1

How can I change the automatic Thumbnail-Link (post-url). I would like to have both links, the source-url and post-url to the same page (not blog post).

or how can I remove the "post-url" from the Thumbnail?

 thanks for the Help!

blog-image-wrapper {
  pointer-events: none !important;
  cursor: default;
}

I tried this.

but it effects both links..

Can you share link? Wee can help easier