I have the meter indicated above, but the battery cables have been released and since I have no scheme and I do not see the welds, I do not know where to weld the cables.
It is very old and I can't find any scheme of possible connections.
In response to the forum I upload photographs where it is clear that the cables have been desoldered because they are very thin and not being held by any grip.
I upload 1 dropbox link with the photos.
https://www.dropbox.com/sh/fw6qqtzqiev4rdx/AADaaNlMp22KbaZnobaW02s5a?dl=0