How to select wall end locations and add symbol to those locations

I would like to select a wall type in revit using dynamo and place a symbol at those wall ends all in one step. Can someone help me get started. Seems simple enough but I am very new to dynamo.

Thanks in advance

What have you tried so far?
You’ll need to get all Wall Types and select the one you want. Then get all instances of that Wall Type and their locations.

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After I have selected the wall type, how do I select all instances in the project?

Try All Elements of Type.