wing foh + s32 + second wing for streaming configuration

Hello.  I recently used Wing in the configuration as in the title.  Unfortunately, there was a problem with gain. I wasn't able to connect two consoles to the stagebox so that I could perform stage gain. I could only use trims on both consoles. Gain was not active. I had to set the gains with one of the consoles turned off. Please let me know if there is any solution to this problem.