Hi, I just talked to a friend who works at Cesab. Hence, the 2 controls Zapi AC2 you see are both for traction, and control the traction motors, 2 while the electronic Panel that is mounted below pump control is ilo.
On the metal part of the electronic Panel where I fixed 2 AC2 you should have printed a M e a S, which stands for traction control traction control Master and Slave.
By logging in to the control Master drive you should be able to make your calibrations.
Send you by email the AC2 control manual and the manual of the PlayStation Zapi.