upr single valve catch can for roush supercharger install

[Greyhorse]

got the UPR 5030-98 single valve catch can, the 2018 roush supercharger has a hose that goes to the bottom of the intake called the pcv purge hose, UPR's website notes that a plug will be need for the roush supercharger set up, does anybody know what purpose this hose has, it would seem that it would see vacuum and boost from the bottom of the intake and would close off the pcv valve if it were under boost but does tie back in to the intake side of the supercharger so maybe no boost seen closing off the pcv valve and also bleeding off some boost back in to the intake tract. anybody install their's , i think the vmp and older roush setups have this same hose, plug it off and dont worry about it??

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[Chainsaw]

Alex Flores has this video of an install on a gen2 coyote. He says to block off the hose. He doesn't say what the hose does.