I didn't use a relay in my positive ground 65 +4. Knowing which way yourMorgan is grounded is vital knowledge whether or not you use a relay.
The poster of the question mentions in an earlier post his car is a 2006 +4 so that would make it a negative earth vehicle!
I have no idea where/when you saw that. Certainly not in this thread.
No but when a poster asks a technical question and does not state the model of car they have it’s not a bad idea to go back to their earlier posts as most people mention their car (or are asked). It’s hard to give advice if you don’t know the model so I always look if it’s not mentioned. All the posts are there and it takes just a few moments.