My 2020 has the injection port for ether below the steering wheel on the right side. I've used it several times. I reckon they put it there for a reason. Any of the starting fluid cans I've bought have removable caps, just take it off and it will fit in the port, no need to screw it in, you don't want that much ether anyhow, just a shot will do after you've got it cranking. Was told by the JD shop to only inject ether after you've got the engine turning over. They said it's prone to blowing holes in the pistons if you inject too much and then try to start it. It works for me when I need it. I also have the coolant heater, that usually works easier but it takes a while to warm up the engine.