Hi
This is a new setup, the only original parts are the motors.
As explained the machine came with a Gecko G540 which had corroded connectors.
The UC100 is from UCCNC so is fine.
The axis config print is for the X-axis the only changes on the other axis is the pin and ports.
X-axis Pul- pin2 Dir- pin3 port 1
Y-axis Pul- pin4 Dir- pin5 port 1
Z-axis Pul- pin6 Dir- pin7 port 1

I hope that has answered all your questions. If you need anything else I am only too happy to oblige.