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1. Go to your webste Preferences > System options > General settings and set Check templates for modifications to YES.
2. Go to Administration panel > Templates then choose a theme you have default on the user side from the list there, then change Forced generation to YES, then choose All modules and Go. This will generate your templates into your theme folder.
3. Go to Administration panel > Maintenance and clear all 3 caches.
4. Now go again to Administration panel > Templates from the left 'Your themes' column choose the theme you have defualt and find a ams_item.html template under the modules/AMS directory and edit is as trabis told you.
5. Clear the cache again via Administration panel > Maintenance.
Mind anchors