I’m not used to electrical components and need to get the wires to connect the robot I/O and this.
I was thinking about getting something similar to this and wanted some advice
There’s no need to use 1mm2 wires (if you’re not using an external PSU for 24V > 2A). 0.5mm2 will do just fine.
Aside from that, you should take into account whether the cable will be stationary or move around a lot. PVC cables are good for stationary applications, whereas PUR cables are more flexible and durable to being flexed often (mounted on the robot for example).