We prefer the ribbon cables and connectors, which is standard on CPU v4, since we have made all of our components plug and play with this system. When interfacing other equipment for which there is not a standard pcb, it can be nice to have screw terminals for making easy connections. Thats why we offer this CPU v4 connection set. For all inputs/ouputs of the CPU we included a PCB with conversion to screw terminals. Parts do need to be soldered. Its is offered as a kit.