"!The VCA Output of the Synthesizer Box module is internally patched to the Left and Right inputs of the Outs module. The internal patching can be disrupted by plugging a patch cable into the Left input of the Outs module.
!The Midi2 module Gate1 is internally patched to the 1V/O input of the Synthesizer Box module. The internal patching can be disrupted by plugging a patch cable into the 1V/O input of the Synthesizer Block module.
!The CV1 Output is internally patched to the Envelope input of the Synthesizer Box module. The internal patching can be disrupted by plugging a patch cable into the Envelope input of the Synthesizer Box module.
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from user manual...