Typical modern practice would be to have a pedal board with all interconnects and power set up and fixed. Hendrix didn’t do that, but EVH did. And now the internet is full of people posting their pedalboards (P&W people especially).
But you still have to plug in from the right with the guitar cord, and from the left for the card to the amp. So I dunno, my theory may be bogus. But this pattern got established very early on, by the late 60s st the latest.
But you still have to plug in from the right with the guitar cord, and from the left for the card to the amp. So I dunno, my theory may be bogus. But this pattern got established very early on, by the late 60s st the latest.