Don't worry, it's MUCH easier than that -- but Google Maps hasn't been updated with the new street layout yet.
From the station turnstiles, turn RIGHT and go OVER the pedestrian bridge, then DOWN the steps. Then cross the Metropolitan Branch Trail and walk down Bryant Street, past "metrobar" (you can't miss the brown-striped rail car parked outside). The exhibit is just past metrobar.
The pedestrian bridge gets you past the tangle of traffic.
An updated aerial view is at this site, but strangely not on Google Maps:
https://retailproperties.cbre.us/p/r...tstreetne#maps
The exhibit is in the former Big Lots building.