I've bought a used Hauwei R2 server at auction but it has a BIOS password that I'm unable to clear. It's not the default Huawei12#$

I've reset the iBMC using the onboard jumper but have been unable to clear the BIOS password.

I wouldn't be too concerened normally but I want to check some virtualistion settings becuase I've got performance problems with ESXi 6.7 running well below what I'd expect. I've removed the CMOS battery for 10 minutes and tried a jumper labeled BIOS_RCV but the BIOS password persists. Documentation is scarce. 

Open to any other ideas others may have?