In a printed circuit board pair, each of the printed circuit boards having a contact region with contact elements, a contact-making system includes a first circuit board having three-dimensionally structured contact elements and a second circuit board also having three-dimensionally structured contact elements structured complementarily with respect to the contact elements of the first circuit board for positioning the two boards together. The contact elements of the first board reciprocally electrically contact the contact elements of the second board. The configuration ensures a high positioning accuracy of the two contact regions with respect to one another. A mask having cutouts for contact elements of the two boards can be provided. Such contact element positioning using the conductor track pattern and being independent of a contact-making housing has the advantage that the positioning accuracy is unaffected by tolerances between the conductor track pattern and the contact-making housing.