Make sure to switch off the kb37 and remove the power plug before installing or removing any modules.
Use a standard 16-pole bus patch cable. On the bus board, there are +12v and -12v connections marked. Make sure to connect the cable on both ends the right way. Refer to the labeling on the plug of your modules or check their user’s manual.
We recommend to install the modules one by one. Power up the kb37 after installing every single additional module to check if you have connected your module the right way. Then switch off again and go on with the next module.
Use a single cable for each of the modules.