Hi,
I've been looking at this post from last year https://www.robotshop.com/letsmakerobots/node/27513. Regnatus posted a mock up diagram and I've been trying to follow it.
I've got the same boards as these with the Rover 5.
A few things... is the GND (black cable) from Motor Controller connected to A0 on the Spider? Also, does it matter which pins on Spider (D1 - D13) I connect to? Lastly, can I connect 9V to the Motor Controller (6 x 1.5 Alkaline batteries)?
Thanks.