3.5mm Male to 3 RCA Female Video AV Component Adapter Cable for TCL TV, Ancable AV in Adapter 6-Inch 3.5mm Plug to Triple RCA Jack Audio/Video Splitter Adapter

Get this one: https://www.amazon.com/dp/B08GFHKVB3 Comes with an adapter (which you may or may not need). Better to have this and not need it, than to need it and not have it. If you can afford it, then this cable is one of the best options available now: https://www.retrogamingcables.co.uk/RAD2X-CABLES/SEGA-MEGA-DRIVE-2-GENESIS-2-32X-HD-RAD2X-HDMI-480P-CABLE If that's too expensive, then check out the Retroscaler2X or the Kaico Sega Genesis HDMI Cable. These are budget options, but will hold you over while you save for something better (or maybe work just fine for your needs).