Here are the XR700 Instructions. Using Rex's guidance and if needed the factory wiring diagram and the installation instructions you should be able to figure out the changes made to the factory wiring.
The X700 is now made by FAST Fuel Air Spark Technology.
XR700 Power Module
Summit Racing has a copy of the old instructions on there website.
Fireball Installation Instructions for XR700 and XR3000
https://static.summitracing.com/global/images/instructions/xr700%20instructions.pdf