COBRA is a little unique compared to other firing systems as individual cues are connected to the module ground and are switched to connect to a shared set of positive pins. If you are designing a custom integration, this is no problem, however, the polarity may be reversed from what you are used to. Since igniters are not sensitive to polarity, this should not be an issue.
The pin-outs on the 6S RJ45 (CAT5) port are:
Pins 1-6 are cues 1-6 (ground)
Pins 7 and 8 are shared positive