I have an electric typewriter that I bought at a yard sale, and am trying to turn into a teletype-esque machine using an Arduino. I already asked this once before, but I've gotten a lot further into figuring out how this thing works. as @PeterJ guessed, it was a matrix, with different keypresses connecting 2 pins.
My question: Knowing which pins were connected by each key, how would I connect the Arduino to the pins to simulate keypresses? There are pictures on my previous question, and I'll put them here if that's needed.