CARRABASSETT VALLEY — Sugarloaf ski resort received parts for a new load terminal unit that will replace the existing motor mechanics of the chairlift that malfunctioned earlier this year, injuring seven skiers and stranding more than 200 riders in midair. “Our biggest priority coming into this season is lift safety,” Sugarloaf’s spokesman, Ethan Austin, said Monday. Parts for the King Pine chairlift’s bottom load terminal arrived Saturday at Sugarloaf from the Utah plant of ropeway-engineering company Doppelmayr.