Missing bolt hole in valve body

I'm installing a Coan RMVB that I bought in 2014 and never installed. So it's new but not new. Anyway, I noticed that one of the bolt holes isn't drilled through the separator plate.


(original Cheetah on top, Coan on bottom)

Could I just leave that bolt out? I know my luck so am reluctant to take the VB apart and don't want to drill it without disassembling to avoid getting metal shavings where they shouldn't be.