Reporting question for Jack Cup - Marshall, for Input Jack On Speaker Cabs, Plastic

Product:
Jack Cup - Marshall, for Input Jack On Speaker Cabs, Plastic

Question:
Is the jack inside of the jack cup or is that sold separate? If so, what is the part # for the correct jack that works with this style?

Answer:
The jack inside the cup is not included and numerous 1/4" jacks will work in a speaker cabinet. We are unable to advise what jack and suggest consulting a tech on the matter.