There should be a rubber plug in the first hole. I don't think the gasket alone can do the job.
Thanks for the reply. I didn't see the rubber plug in the parts fiche??
I'm also getting a good leak from the counter shaft top gear??
I looked too, out of curiosity and didn't see it. I don't think its available. It should never be removed and hence never replaced. There was another thread about this, and it forced me to pull my trans cover and look as i didn't remember if mine was there or not. (fresh rebuild). It was there. Time to source one, hardware, another case, etc.
If you mean the bearing that you can see from the shifter cover, it should allow oil to pass into the shifter area.
If you mean the drive sprocket, that's the chain oiler working overtime. You can turn it almost off with the adjusting screw, or remove it and screw a plug in. Watch that you have the correct thread and length. The threaded part of a spark plug will work.