Have you asked whether we can use the data in that map? The basemap is OSM, but the layer above it is by the uni and typically we're not allowed to use geodata by others unless either compatible by license (usually unlikely) or we have explicit permission.

So in terms of what we can legally do in OSM, an approximate location is probably fine. Especially when the location is described in the POI, which probably helps more than the location on the map.