Does anyone know how to tighten the power terminals ( +,-) on the adler barbour coldmachine compressor show in the attached photo. I've updated the photo. The red wire is not making a good connection. I've tried screwdrivers, allen wrenches, rotating the outer ring with a needle nose pliers. no luck.
John & Kathy Impagliazzo
1994 C36 TR #1339, M35AC