Sorry, i cannot follow you. Are you want to install Grub2 on the internal SDD?
Is the SSD has the msdos type partition table or GPT?
What are the flags on sda1 and sda2?
What is the BIOS boot mode? UEFI or CSM?
Anyway, I recommend to install BionicPup on a USB, and run Grub2config from BionicPup.