Ohhhh! Okay, so you want to do a clickable link?

If so, click the earth/link symbol (I'll attach an image).

Then Enter the complete URL for the link you wish to add when prompted, such as:

http://www.aus-city.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=47315#Post47315

Then it will say: Now enter the title of the webpage you are linking to.

Type in whatever you like, such as: See my OMGosh post.

Is this what you wanted?

Also, there might be a question as to how to direct to an individual post within a topic (so it doesn't just go to the first post, but rather one post specifically). In that case, you could past in for example:

http://www.aus-city.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=47315#Post47315

But manually change the end of this link to reflect the post # you want such as #47319

http://www.aus-city.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=47315#Post47319

Let me know if I'm still not on the right track!