You have many ODBC connections and like to backup/save them somewhere or recreate them into a new profile? Than look into this Registry entries:
HKEY_CURRENT_USER\Software\ODBC for User DSNs
HKEY_LOCAL_MACHINE\Software\ODBC for System DSNs
File DSNs are held in directories. These directories are listed in
KHKEY_LOCAL_MACHINE\Software\ODBC\ODBC.INI\ODBC File DSN
BTW: When you like to reuse your saved ones in a new profile (new PC?), be sure that all the ODBC drivers exist (some come with Windows some not and need to be add manually).