Thanks @Programster solution works for me. Since I do not even have SSH access, I have to install and use virt-edit.
sudo apt install libguestfs-tools
sudo virt-edit -d myVM /boot/grub/grub.cfg
Replace all 'quiet' with 'quite console=ttyS0' and start my VM for console connect.
virsh start myVM && virsh console myVM
Do not forget to edit and update grub per @programster answer after login.