Err! The part after the .jpg surely.
I find it easier to reduce the photo to no more than 1200 x 900 or 800 x 600 (or what ever proportion is correct), and either attach it to the post (800 x 600 is better for that) or post it in one of the TM photo forums.
From the photo forum there is a ready link under the post for each size that may be copied and posted directly in another post. There is then no need to use the Image button for inserting it as the img codes are already in place.
Below is the thumbnail from The Austrian's successful post in the photo forum.

It looks like this:
[img]http://www.talkmorgan.com/gallery/26/thumbs/22016.jpg[/img]