MOORESVILLE, N.C. – Matt Mills will make his NASCAR Cup Series debut this weekend at Kansas Speedway in the No. 55 Ford Mustang fielded by BJ McLeod Motorsports. The No. 55 Ford Mills will drive will carry sponsorship from Siebert Electric. J.F. Electric, a long-time partner of Mills in the NASCAR Xfinity Series, will also sponsor Mills during his Cup Series debut.