Moving the output pin for each universe

Hi there, i know that this library can support up to 16 universe, but i don't need that much. I only need 6 universe to be output, i managed to reduce the number of pin used from the tx16.pio file. However i also wanted to move the output pin to other GPIO pin, (e.g only pin 4, 8, 12, and 16 used to output the dmx signal).

How can i do that? What settings should i change?