I have done 2 rapid fire mods on the right trigger before, but now I am attempting to add a rapid fire mod to the left trigger. the problem i am having is finding where to solder one last point to

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the problem lies within the wire in brown, i have tried both solder points without success.
i am keeping the wiring the same as it is for the right trigger
the right trigger mod works as of now, but the left does not

i am using a matrix controller with 2 rapid fire mod chips from maddogcontrollers.com (kit 60)