If you look in the Modern era manual's updated index (Supplement 17), you would see that your 2313 light tower is covered in chapter 14. I found it in the base manual.
It does get hard to find things when they are in the supplements.
There are pages on the Hudson too.
By the way, Lionel tweaked lots of parts as they reactivated postwar items in the modern era. Parts are not always interchangeable.
