You can check a box which will identify the node with the max plot value (in your case von mises). Right click on the plot in the results folder of your study -> click "Chart Options" -> check the second box down called "Show max annotation". A box should pop up on your plot showing were the max stress is.
Typically if the max doesn't make sense, it will be boundary condition related.
Nice profile pic! Thanks for your answer.
The max does not make sense...as it seems to be on a fixed part of the assembly.
Is there a way to locate the max stress within a single part of the assembly?
If you need the max stress within a component that is not the max stress of the whole assembly, you can right click on the study and go to "Probe" -> Click the button for "On selected entities" -> click the faces of the part in question -> click "Update". A list of nodal stress values will pop up and you can click the top of the column to sort by value. Select the row with the highest value and a box will show up in the graphics window showing you where that node is located.
Just note that this will only show you the max for the faces you selected. You can probably select all the faces in one shot since it looks like a fairly simple part. Just check to make sure that max value matches the 75,784.6 ksi at the top of your color bar.