I believe the 41 150mm Werfer Battalion TOE(OB) is a missing its organic AA/LMGs elements.
In the example provided, you will see authorized TOE elements of:
3 37mm PaK36 AT Guns
18 150mm Nebelwerfer
What appears to be missing are the 6 LMGs. The missing LMGs do not appear within the AT Gun or Nebelwerfer WiTE2 element definition either.
see page 622, VOLUME IIAThe LMGs were dual AA mounts on light transports (Kfz. 4s).
Also see following:
The items in RED appear to be missing from the WiTE2 TOE(OB).
Note - Whereas the Nebel-Lehr, 51, 52, 53 & 54 Nebelwerfers were organized as a regiment, in WiTE2 they seem to have been broken down into Battalions. Never-the-less, they still are fundamentally based on the same underlying KStN.