Inherited CapsuleComponent doesn't show socket

Development Programming & Scripting C++
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1

In the blueprint of an actor i have a mesh with inherited UCapsuleComponent but the Parent Socket field is empty, it doesn’t show “None” or opens Browse avaible sockets

The header contains

private:
	UPROPERTY(VisibleDefaultsOnly, Category = Mesh)
		USkeletalMeshComponent* Mesh3P;
	UPROPERTY(VisibleAnywhere, Category = Skeleton)
		UCapsuleComponent* HeadComponent;

while the .cpp

AAICharacter::AAICharacter(const FObjectInitializer& ObjectInitializer)
{
Mesh3P = ObjectInitializer.CreateDefaultSubobject<USkeletalMeshComponent>(this, TEXT("3P"));
RootComponent = Mesh3P;

HeadComponent = ObjectInitializer.CreateDefaultSubobject<UCapsuleComponent>(this, TEXT("Head"));
HeadComponent->InitCapsuleSize(34.0f, 88.0f);
HeadComponent->AttachParent = Mesh3P;
}

How can I retrieve the socket list and choose what socket attach to?