The poison glands sit just below the head/jaw area, so that one's easy.
I learned during a major marital tiff one day involving a live snake needing to be transported in my airconditioned truck and my then toddler, that keeping the snakes very cool makes them docile and sluggish.
Personally I prefer a mushroom curry, but hey... if ever I HAVE to, I know how to prepare a snake. And many, many people in jungles and refugee camps in particular, do eat them cos there is little else.
Do people eat them in India? I'm Dutch originally and smoked eel is very normal.