I was installing Ubuntu 20.04 on my 500GB SSD. Windows 10 was installed on my 250GB NVMe SSD. I chose the EFI partition to install the grub bootloader on my 500GB SSD that was created during the Ubuntu installation when I set up the partitions for Ubuntu. However, after I finished installing Ubuntu on 500GB SSD, it actually did not install the grub bootloader to the EFI partition on the 500GB SSD that I specified during the installation. Instead it installed the grub bootloader to the 100MB EFI partition on my 250GB NVME SSD, which is the SSD that Windows 10 is installed on. The BIOS on my motherboard does not have an option to disable the NVMe ports. Is it necessary to disconnect my 250GB NVMe drive, the physical drive that Windows 10 is installed on, before I install Ubuntu on the 500GB SSD if I want to have the grub bootloader to install on the physical drive that Ubuntu is installed on? I really don't want to open up my PC and disconnect my NVMe drive as it's too much work removing the heatsink, especially with the sticky thermal pad that is literally glued to the NVMe drive, and then reinstalling the NVme drive, and carefully installing the heatsink with precision as it has to line up with the screw holes on my motherboard for the NVMe heatsink, especially with the sticky thermal pad sticking when the heatsink is not lined up with the motherboard's scew holes for the NVME heatsink. I once did that and I had a very difficult time removing the heatsink for the NVMe and an even more difficult time installing the heatsink for the NVMe because of the sticky thermal pad and small screw holes on the heatsink, as I can barely see through the screw holes of the heatsink, which makes it difficult for me to line up the heatsink.