MEGA Helix xducers would be 2d, DI, left SI, right SI, temp and a common ground ...
MEGA SOLIX xducers have a dedicated ground per channel and XID ...
Removing wires without capability to shut off transmitters for non-used piezoes could potentially damage those transmitters ...
SOLIX does have some control to shut off individual transmitters - HELIX is all or none ...
Rickie