The new 4 pin DiveCan connector only fits the shearwater computer or nerd with 4pin AKcable attached.
This is a very robust connector that is being used as an alternative to Fischer connectors, rather than the Fischer socket on the computer this cable system when used with the appropriate computer puts the connector inline with the 2 halves of the cable.
This cable makes it possible to monitor 3 Molex sensors GBM Rebreather