This screen prompts you with:
Installing the bootloader... What device do you want to install the bootloader on? [/dev/hda] >
with the square brackets around the suggested default. Enter the device you want the bootloader installed to, or press the "Enter" key to accept the default value.
You will see the next screen if everything went well, and "grub-install" output is displayed on vt3 (Alt+F3).