Contact your local Registrar (shown below) for a form to fill out and mail in with your check payment. Details or instructions on registering with the Minnesota LMSC are available here.
The Minnesota LMSC Registrar is:
E2401 Quail Run Rd
Eau Claire, WI 54701-9662
EMail Pamela Ogden
More information, or more up-to-date information may be available at the Minnesota LMSC web site.