How to setup a class to load on start up in my WPF shell application, without calling inside Application Start up method

Question

I have Prism Shell application, There is class which primarily focused execuing method on subscribed events. These events are fired from a separate module in my solution.

My class is ApplicationMenuSubscriber which is in my shell application. My shell is boot strapped with MEFBootStrapper. I may not directly want to wire my ApplicationMenuSubscriber inside shell startup, instead i want this class to be picked up automatically by MEF. Is there a way in doing this in Prism

public class ApplicationMenuSubscriber
    {
        private readonly IRegionManager regionManager;
        private readonly IMenuService menuService;
        private readonly IEventAggregator events;

        [ImportingConstructor]
        public ApplicationMenuSubscriber(IRegionManager regionManager, IEventAggregator events, IMenuService menuService)
        {
            this.regionManager = regionManager;
            this.menuService = menuService;
            this.events = events;    

            //subscribe to events
            events.GetEvent<MenuEvent>().Subscribe(MenuFired);
        }

        private void MenuFired(ApplicationEventArgs obj)
        {
            //check
            if (obj.Source == MenuConstants.LOGIN)
            { 
                //log
            }
        }

    }