How to get reference of a custom class instance?

Hello.

I’m struggling to get a reference of a custom class derived from AActor.
I’ve defined a pointer to this custom class :

AManipulateur* HandlingRobot;

I need to set this pointer to the instance of this class I have in my scene.

I was thinking of using :

UGameplayStatics::GetActorOfClass(),

but it returns an AActor* pointer, and not a AManipulateur* pointer.

What would be the best way to do it?
A cast? How would I set it?

Thanks for your help.