The grub kernel can be installed either to the MBR of any drive or to the BR of any partition, depending on what your needs are.
This is selectable on Mint during the install routine on the live cd. When you get to that page it will be called "Advanced.' The button is in the lower right hand corner of the screen. You will recognize it when you see it.
Insanity: Doing the same thing over and over and each time expecting a different result.
Democracy is 2 wolves and a lamb voting on the menu. Liberty is an armed lamb protesting the electoral outcome. A Republic negates the need for an armed protest.