I don't think they have an official position. Even if they do though, what difference would it make? Both the SSPX and the CMRI have absolutely no jurisdiction, meaning that their opinions hold no more weight than any Catholic, including all of us on CathInfo.
People who make comments like the one above have a poor understanding of jurisdiction.
Once the Vatican entered apostasy, they lost jurisdiction while one holy SSPX priest has Our Lord's very own jurisdiction, the Heavenly kind. A validly ordained priest, for example, a Catholic priest ordained using the pre-Paul VI rites, is a vicar of Christ. Even a pope of the standing of Pope Leo XIII is a witness to the faith just like any Catholic in the pews.
Now, tell me, what is the SSPX position on the CMRI.