Which monitor is used to show the booting screen?

When I am booting my mac mini, how does it pick which of the three monitors it uses to show the apple logo and password screen on? (This is not necessarily the same screen declared as the primary for the menu bar.)

I have three monitors that are positioned like a TIE Fighter, and I would prefer not to have to look at the boot info sideways as it is starting up. Based on the answer, I should be able to determine a method by which proper screen can be obtained.

The Mac mini models, that support up to 3 displays, normally use one of the USB-C ports for the display with the initial Apple logo. The HDMI port would only be used for the initial Apple logo display when there are no USB-C port connected displays. I can only assume that if three displays were connected, then the same USB-C port connected display would always be the initial Apple logo display. In other words, you not going to know which of the two USB-C port connected displays will be chosen for the initial Apple logo until you turn on the Mac. And, that this choice would be consistent.