private void AttachToBack(PickupInteraction item)
    {
        HumanoidAttachment attach_manager = GetComponent <HumanoidAttachment>();

        if (attach_manager != null && item != null)
        {
            item.AttachTo(attach_manager.attach_back);
        }
    }
    private void AttachToRightHand(PickupInteraction item)
    {
        HumanoidAttachment attach_manager = GetComponent <HumanoidAttachment>();

        if (attach_manager != null && item != null)
        {
            item.AttachTo(attach_manager.attach_right_hand);
        }
    }