Have maps use AI to identify where Manholes are if you have a map layer for Assets and locations, but not manholes specifically. If asset X has "M1" and "M2" as its upstream and downstream manholes respectively, and asset Y has "M2" and "M3" as its up and downstream manholes, then the feature would suggest a manhole between linked assets. Even better if it confirmed such a thing after seeing an AMH NASSCO code in the inspection data.