this works here:
@ECHO OFF &SETLOCAL disableDelayedExpansion
reg add "HKCU\Software\SAP\NWBC\Settings\Pages\RuntimeConnections\BAG_1BC8D0D7E86C3C468F1A2F947453D983"
reg add "HKCU\Software\SAP\NWBC\Settings\Pages\RuntimeConnections\BAG_1BC8D0D7E86C3C468F1A2F947453D983" /v "NAME" /d "Process Integration Development"
reg add "HKCU\Software\SAP\NWBC\Settings\Pages\RuntimeConnections\BAG_1BC8D0D7E86C3C468F1A2F947453D983" /v "URL" /d "server URL"
reg add "HKCU\Software\SAP\NWBC\Settings\Pages\RuntimeConnections\BAG_1BC8D0D7E86C3C468F1A2F947453D983" /v "CLIENT" /d "100" /t REG_DWORD
reg add "HKCU\Software\SAP\NWBC\Settings\Pages\RuntimeConnections\BAG_1BC8D0D7E86C3C468F1A2F947453D983" /v "LANGUAGE" /d "EN"
session protocol:
C:\Users\Endoro>reg query "HKCU\Software\SAP\NWBC\Settings\Pages\RuntimeConnections\BAG_1BC8D0D7E86C3C468F1A2F947453D983" HKEY_CURRENT_USER\Software\SAP\NWBC\Settings\Pages\RuntimeConnections\BAG_1BC8D0D7E86C3C468F1A2F947453D983 (Default) REG_SZ NAME REG_SZ Process Integration Development URL REG_SZ server URL CLIENT REG_DWORD 0x64 LANGUAGE REG_SZ EN