VCE 25-Pack UL Listed Cat6 RJ45 Pass Through Connector, 10Gbps Unshielded Ethernet Modular Plugs, Gold Plated 8P8C Cat 6 Ends for 24-26AWG Solid or Stranded UTP Network Cable Support PoE

You could take a gamble on this: https://www.amazon.com/JARNHNG-Cat6-Cable-500ft-Waterproof/dp/B0DP24BRHB Picture shows stranded, but multiple places in the listing say it is solid copper, not stranded or CCA. So hopefully you get solid cable that can be terminated to a connector easier. And some connectors meant for smaller wire: https://www.amazon.com/VCE-Connectors-Ethernet-23-26AWG-Stranded/dp/B0FNW3L3PG