Hi, I am Dave, I will help you with this.
If you want the second SSD to have its own boot (EFI) partition then the usual method is to remove the first SDD during the installation, other than that you will end up with a dual boot system which will have a blue screen to ask you which version of Windows to boto into.
If you want both drives to have their own EFI partition, then you would not have a dual boot system you would need to boot into BIOS to change the boot order to get into the other operating system
What way do you want the PC to startup with a dual boot or by going into BIOS when you need to change operating systems?