in P41003 for SWM module, should we set UOM 1M = 30 days or 1M = 30.4166667 Days?

We are implementing Service Warranty Managaement module, standard JDE provides P41003 (Standard Units of Measure) setup as 1M = 30 days. Should it be set as 1M = 30.4166667 Days as we see in JDE steltix demo.? Can someone explain , how system uses this in billing work file generation. I did observed that contract duration field gets calculated based on it and 1M = 30.4166667 Days is making more sense to me.

Can someone know what are implications for this setup. Also if i set 1M = 30.4166667 Days, can this have an impact on other existing JDE modules. We are not using amortization process.