Not sure what theme you are using there (very squashed up in a small column width judging by the image) but – you need to copy the spTopicView.php template from the parent theme (/templates folder) into the equivalent location within the child theme. Note – if Reboot or BareBones then there is a desktop version and a separate mobile version both of which will need to be copied across with each having the device type appended to the name.
Then open the spTopicView file in the child theme for editing. MUST be a plain text editor!
Locate the line of code that is:
sp_PostIndexContent('', __sp('Awaiting Moderation'));
And add the following block of code immediately after it. Use the ‘raw code’ button below and copy it from the subsequent popup.
if ($spThisPost->post_index == 1) {
if (function_exists('sp_TopicHeaderShowBlogLink')) {
sp_TopicHeaderShowBlogLink('icon=sp_BlogLinkWhite.png', __sp('Read the original blog post'), __sp('Click to go to original blog post'));
}
}
That should do the trick.