Dumb question alert - fitting extinguisher

Yes, yes I know it’s a ridiculous question, but what is the best way/best position in car to fit an official Exige fire extinguisher (the black one with Exige lettering).I could of course just go ahead and do this but as some of you will no doubt have been down this path before I’d greatly appreciate your experience.In particular would be obliged if anyone could post pics of their extinguishers in situ.Brilliantly, of course, Lotus does not deign to provide any fixings…

There is detail in the Elise service notes - motorsport section where and how to fit.