Can you post a picture of the unit itself please

Sorry, I can't. Development is outsourced so I don't have picture of the unit. Also, it's proprietary. However, @Irving created a picture of CAN Transceiver and CAN connector pinout in this thread.

 

Sorry, I can't. Development is outsourced so I don't have picture of the unit. Also, it's proprietary. However, @Irving created a picture of CAN Transceiver and CAN connector pinout in this thread.

you ask what is the intent of the paired pins
Id say that without further input from yourself
then we are all guessing

Personally Id guess some one could not make up there mind on pin out is as likley as anything :->

 

Are there two CAN networks? First CAN network is battery monitor CAN transceiver 1 is connected to joystick. And second CAN network is battery monitor CAN transceiver 2 is connected to motor controller?

Yes. Originally joystick connected directly to motor controller (and from there to other devices). My battery monitor is inserted as a bridge between joystick and motor controller creating 2 independant networks and controlling the flow of information between them.