If I remember the Herc, those lasers are the rear mounted ones. But I could be wrong, it's probably been almost 20 years since I assembled mine! :D
Be careful with those rear mounted lasers, they are tiny and tend to get lost during assembly. One of mine jumped of the tweezers and has never been seen again. Had to replace it with a homemade something.
Wow, that's great find. The Hercules, Anvil Anv-3m, and the Dart Drt-3S were extremely hard to find when i was looking for them 5 years ago. Especially the Anvil. Great find indeed! I hope you get great paint job for them!