Dreamcast with broken solder point

[Zarkon]

Hello.

I have a dreamcast that has a point
broken solder.

It is at the bottom of the board, where the Gdrom connector goes. There are a lot of round flat welds next to the holes in the tracks.

I think the one that is missing is A2 but I couldn't find the pinouts for port G1 to know what it does.

I have connected a GDEmu and all the games have worked.

I have tried to fill the gap with tin but it won't stay.

Do you know if that flat weld is necessary?
I know it is used when you want to connect an Ide cable to a hard drive.