what's weird is that Amazoning for it makes it look like a lot of connectors with different geometry between the pins are all called "M8." glad that's not confusing at all!! thank you for the tip tho, this is at least giving me something to search. I think I need at least 4 feet of reach but a lot of the options are very short. ETA: Found it. https://www.amazon.com/dp/B0899WX1G6?ref_=cm_sw_r_apan_dp_YDK5D13A92REZR8EEMQ4&th=1