Go here: locale > locale\de\ui > loginwindow.py
then scroll down to this part of the code:
## ConnectBoard
{
"name" : "ConnectBoard",
"type" : "thinboard",
"x" : (SCREEN_WIDTH - 208) / 2,
"y" : (SCREEN_HEIGHT - 435 - 35),
"width" : 208,
"height" : 30,
these code is from my client and it works very well. the guide was made by @by Noa