If you want all models used, including the stock one, leave the custom models field blank in the AI config for the camera.
To specify a model list the name of the model. Multiple models can be listed and separated by commas.
Models can be avoided by listing the model followed by a colon and a zero, IE objects:0 Multiples can be avoided by listing them separated by commas.
No spaces are used between any of the punctuation.
Be careful to get the names correct, including capitalization if the model has any capitals. The case of letters must match, exactly, for DS to recognize them.
Don't forget to specify objects you want to detect for each model in use unless you want to search for and detect all objects in the model.