the documentation is extremely confusing!

[Richard Marin]

I have board revision 1.2 and I found the building documentation (English) very confusing and mixed with japanesse.
For example, there are two possible locations for the pro-micro, but it is not specified which side the pro-micro should be attached
for example, it says:

"but pay attention when installing the Pro Micro!!!!!! Note: The below diagrams are for rev 1.1. For rev 1.2. and up, the part placement is slightly different."

for the master and slave in the latest firmware ( after this date 2019/5/5): Do I need to do any soldering (jumper) as it is shown below or not?

[omkbd]

I'm sorry I confused you.

"but pay attention when installing the Pro Micro!!!!!! Note: The below diagrams are for rev 1.1. For rev 1.2. and up, the part placement is slightly different."

Plaese read section 6.
https://github.com/omkbd/ErgoDash/blob/master/Doc/build-en.md#6-pro-micro-header--and-reset-switch-installation

for the master and slave in the latest firmware ( after this date 2019/5/5): Do I need to do any soldering (jumper) as it is shown below or not?

The latest version is as follows.
https://github.com/omkbd/picture/blob/master/Jump2-en.png