Onshape document: https://cad.onshape.com/documents/5bc97312a51da9e236468819/w/34a2f9b8ae90cc6a43fbfad0/e/d003d2046b7c9fd87884f0af?renderMode=0&uiState=6592346d0af0de3b844c8dc6
The author remixed this model.
I took the fitted port section from the STL (to save myself time trying to get those dimensions right myself), and attached it to my own plate with an angled insert.