john-users - How does john detect salt

Message-ID: <2a059ba291c04c478faf741c7bd28eff@SVEX0103.Legacy01.LegacyBank.com>
Date: Fri, 29 Nov 2019 21:17:48 +0000
From: David Taylor <DavidT@...acybank.com>
To: "john-users@...ts.openwall.com" <john-users@...ts.openwall.com>
Subject: How does john detect salt

Given a password input such as 

$argon2i$m=700000,t=1,p=8$ncckjx4uQTSp37MMsQWtH+SDj+q/kl/RgVsbpuR/dHP6KsWym8oHbCr7Vt161Cd8

how could john detect which of the bytes are salt and which are password?

If a standard pattern of identifying the bytes which are part of the salt is not possible, 
would any wordlist/dictionary/mask attack still be usable?

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