Close 🙂 On the F-16, they are “just” conformal fuel tanks. No sensors, no ammunition attached to them.

The F-15 in an E version, so, you have just bomb racks on the pylons (they might be able to receive air to air missile adapters, but I doubt it)

Here a link to a shema of what is what

http://www.f-15e.info/joomla/index.php?option=com_content&view=article&id=122%3Aexternal-stores&catid=73%3Aweapons-stores&Itemid=170&lang=en

Many thanks for that it all makes sense to me now.