sadly that does very much look like the fill hole
why was it having new box oil anyway?
It had some additive to try and improve it. I paid a lot of money recently and had every bearing in the box replaced. It hasn't fixed the whine from the box and I assume this was an attempt to improve it.
He didn't recondition the box, it was sent to a transmission place somewhere near I believe... Exeter.
I think I am going to have to stamp my feet, but its not something that I am good at! He said he'll take it for the day when I get back and go over it. He said if the box is damaged he will get it sorted.
it will be fine i drove for 60 miles in a car with no gearbox oil in all