The simple answer is anything from 16-20 AWG
should be fine. The smaller the number, the larger the wire and more current capacity. 16 is about the largest that will fit into the terminal. The max current a DOIARP should ever draw is about 900mA. Even 22-24 AWG can usually handle the current, but smaller wires are less durable and tend to break easily.
May 13, 2019