Cat6 Ethernet Cable 500ft - 26AWG UTP Bulk Spool, Direct Burial Rated, UV Resistant & Weatherproof, Wire for Security Camera Signal Transmission & LAN (Connectors Not Included)

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