The American contact on the DS 160 form should fill in the administrative office of the unit, company or school where he has been as a visiting scholar. The contact person is generally the relevant person in charge of the administrative office (or relevant HR). Because your identity is J2, you usually prepare the DS20 19 form sent by the United States, which was given to you by the United States. You and your husband will have a DS20 19 form. So America must know that you exist. Wish you success! I am writing this letter to you as J2 in America now, haha.