TH--
I hope these four photos are large enough for you to see how I attach the tow bar to my car.
I bought the tow eyes from DW but there are probably other suppliers whose eyes are the same or similar. I cannot remember where I bought the tow bar but you will find a similar one at Harbor Freight. I modified it by having solid steel bar stock of appropriate diameter to fit the eyes welded onto the ends of the tow bar, with holes drilled in the ends to receive the spring-loaded linch pins. Once the bars are in the tow eyes I set up the light cross bar and rig the safety chain around the anti-roll bar, then hook up to the tow hitch.
I do not tie down the Healey's steering wheel but rather let the car follow along and it tracks perfectly with the front wheels moving to left/right on turns on their own. I DO NOT GO INTO REVERSE!!!
Some time back we had a good--if perhaps inconclusive--discussion about flat-towing our cars at:
https://www.britishcarforum.com/bcf/showthread.php?68049-Towing-a-Healey
Perhaps your post will cause us to revisit the matter, and in any case I hope this helps and that you do not have to make an emergency evacuation .