SceneCapture2D for very dark minimaps

So far I’ve implemented a minimap for our horror game, however the map contents are only visible while the map’s lighting is cranked up.
Can I tell the SceneCapture2D component to only capture an image of the unlit version of the scene or is there a way to attach a lightsource to the SceneCapture that will only be visible to the camera of the SceneCapture?

I really don’t want to resort to taking a topdown screenshot of the unlit map and using that texture as a minimap background, since its rather unflexible.