Review on 🔌 yarachel 25Pairs / 50PCS Solar Connectors - IP67 Waterproof Male & Female Connector Kit (25 Pairs Solar connectors) by Kaushik Inlawker

Connectors are ok except the round end that slides over the cable is too small in diameter to grip with a standard MC4 wrench will. You can improvise with pliers, but it's time consuming, difficult in tight spots, and (most problematically) difficult to seal the cable tightly as required for outdoor applications. I think these connectors work better with an H4 key, but they're more expensive and harder to find than the MC4 (which you probably already have).