Single master cylinder bleed procedure 64 c10

[Figuarus]

guys I'm sorry, I know its a stupid question, but I cannot for the life of me remember

are you supposed to use the bleeder screw at the front of the master cylinder to get all the air out? or are you supposed to bleed it out of the main line?

I cannot remember how to do this particular master cylinder. it's been way too long since I've done a bench bleed, and the last time I did one I remember having to use the main bleed lines and rub them back into the reservoir. any help is greatly appreciated.
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