It doesn't have a screen so I'll need to do a headless installation
I found some simple instructions here: https://tarneo.fr/posts/arch_headless/
sudo pacman -S archiso
mkdir arch-headless && cd arch-headless
cp -r /usr/share/archiso/configs/releng/ .
mkdir releng/airootfs/root/.ssh/
cp ~/.ssh/id_rsa.pub releng/airootfs/root/.ssh/authorized_keys
sudo mkarchiso -v -o ./out ./releng
Insert a usb key, mine is in /dev/sdc, and create a bootable usb drive
dd if=./out/archlinux-2025.03.21-x86_64.iso of=/dev/sdc bs=4M; sync
Find the IP address of the machine, and ssh to it. You can then run archinstall for example.