Tried everything possible but no s19 firmware would work on it.

The original firmware this unit came with had S20 instead of S19 on the miner dashboard page.
I removed the rear fan and took some pictures of the hashboards. You can see them here https://imgur.com/a/TbAaOO3
The hashboards actually have a s20 sticker on it.

So it seems this is either an experimental or pre-released S20 unit, since AFAIK antminer S20 does not exist in the wild. Also the hashboads all have different serial numbers, so i have mixed hashboards on this unit.
Anyone know where to find S20 firmware?