The contact person can write the name of the person in charge related to the applicant. Of course, the phone number and fax number can be used to contact the applicant. The postal code is the postal code where you fill in the applicant's contact address. If you want to be direct, just copy the person in charge of the applicant's business license and the relevant address. As long as the applicant can be contacted by phone or fax, it will be fine.