Actor "BaseAdvancedWeapon" to "BP_MotionController"?

Hi community,
need help with a new prject.

In “MotionControllerPawn” I can place the Actor with “AttachActorToComponent”. Unfortunately this only works in “MotionControllerPawn”.

See Screen:

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Question: How can I place the actor “BaseAdvancedWeapon” in “BP_MotionController”?

Sorry for my enlish. Am looking forward to any feedback.