@Jau does have design for these and is using slightly oval shaped holes: DIYBMS for Lithium Iron Phosphate battery cells (LiFePo4) 280aH - #16 by Jau
I have both GBS battery bank that would require the current module board but also 270-280Ah Lishen LiFePO4 prismatic cells which would be much better to use the design Jau has in that thread. The design files are at DIYBMS_Prismatic - EasyEDA open source hardware lab