Most standard cases use a 9-pin block. The IPMSB-H61 uses a (pin 10 missing as key). Looking at the board with the PCIe slots facing down:
(common version):
Pros:
I couldn’t find an official manual specifically named in my database, but here’s what you can do: pegatron ipmsb-h61 manual
highlights the "FLASH_OVERRIDE" and "CLEAR CMOS" selectors. Clearing the BIOS settings involves unplugging the system Most standard cases use a 9-pin block