Anyone knows which mount for Godox K-150A Mini Master ??

Nevertheless your Elin reflectors won't fit.

If the adaptor fits the Godox diameter I'd use it for narrow beam reflectors - not for wide beam as the built-in reflector will likely emit at 50 degree. Also it's not advisable for softboxes - the required speedring would set back the flashtube even more.

For softboxes I'd get a ridgit adaptor as this one:

Walimex universal softbox adaptor

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cheers, Peter
Germany