The " * " in the command is actually a "switch" to prompt for a password (and display stars when it's typed rather than 'printing' it to the screen). If you want to supply the password put it in place of your *.
net use g: \\192.168.67.2\primary mypassword /user:tscnovi\sbsadmin
NOTE - just stating the obvious, bear with me; you have to type the password in plain text - it can be seen by anyone with access to the file.