Wiring Question

[98formy]

For my controller, which is a 15974 nos progressive controller, it wants to tie into the ground coil trigger wire (low volt reference) to use the window switch. Is that the brown wire that seems to run to all the coils or is it the one next to it? I know its not the outside wires, they are the true ground and power. For the TPS, its the purple wire, right which is the wire that shows the voltage change from .7 to 5 volts roughly.

[98formy]

Figured out, the purple wire off the coil (#1 cyl) is the magic wire.