Another wiring option is to google or ebay "Arduino jumper cable". They come in various lengths, colors, male-male, female-male, etc. I'd think a female-male jumper would work for you. The female-socket side would plug onto the pins of the relay module, and the male-pin side would plug into the AIU's screw terminals. Arduino controllers are quite the rage now and they use the same 0.1" spaced pins so you might find the pricing of these cables attractive.
