If my memory serves me, and if the status remains quo, you'll have the option to select either Bay 3 or Bay 4.

I don't think your TM backup will show up, because it's not a bootable volume.

You may find Move your data to a new Mac helpful.

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire