Where is the Spigot.yml

I am not sure if I can't find it or if it can't be accessed through aternos, but is there a way to get in the spigot.yml file for your server? My reason for needing access to the yml is that I am using the DiscordSRV plug-in for both discord to/from game chat and as a log for the server console, I would set up repeating command blocks to preform certain functions but it clogs the console. I know there is /gamerule CommandBlockOutput false to clean up chat, and /gamerule LogAdminCommands can clean the console, but I only want to ignore the command block output in console but still track player command output. I am using spigot 1.12.1 and on https://www.spigotmc.org/wiki/spigot-configuration/ it shows the command "silent-commandblock-console", which is exactly what I need. It seems this is not something that can just be typed in game or in the console, but in the spigot.yml file. If somehow I am missing where the yml is, I wish to be directed to it and apologize for my mistake, or if I do not have access to the yml I would kindly ask how I could gain access and why it is not currently available.