Gearbox bolt question

[Pucketsport]

I have a slight leak from one of the small bolts on the underside of my gearbox. I want to remove it and put a new washer on but before I do that can someone tell me if that will disturb some internal shaft or gear ? or can it safely be removed and replaced ? See attached image pointing to the bolt in question.

[Pucketsport]

Got a reply off-line from Darren at Minor Magic, thanks Darren. For anyone interested the bolt locates the reverse gear shaft. I was able to carefully remove and replace without an issue but was touch and go