Post Login commands for Terminal on MacOS doesnt seem to work

I have an automated process that creates a JSON for my hosts and i import into RDM and it works great. This for a new build/standup for a customer. It's a new customer every week and then i just delete it and re-create for the next customer and then re-import into a new database. I'm trying to login to Linux systems via SSH. I use the broadcast feature to then send multiple setup commands to each host to build them all in parallell.

However, it seems that the Post-Login page of the SSH session is not working.

First, i'm trying to send 2x CTRL-C to break the login process and return me to a command prompt. It sends the text {CTRL}C but not the actual control character. I might be doing it wrong. What is the string to add in Post-Login to be able to send a CTRL-C? (or actually send 2 CTRL-C with a 1 second delay after initial SSH is established, and then another 1 second delay until the 2nd CTRL-C.)

Second, when i try to edit what i have, i cannot add new commands. The + button is is greyed out. I can edit the existing commands added via JSON, and i can edit the delay. But i cant seem to add new commands.

Here is the JSON i create to import. It will create the SSH session and link to a linked credential.

 {
 "ConnectionType": "SSHShell",
 "OpenEmbedded": true,
 "CredentialConnectionID": "xxxxxxxxxxxxxxxxxxxxx",
 "Group": "xxx\\xxx\\xxx\\xxx",
 "TabGroupMode": "Inherited",
 "ColorMode": "Inherited",
 "Name": "xxxxxxxxxx",
 "Terminal": {
 "UseServerWindowTitle": false,
 "Font": "Menlo",
 "DisconnectAction": "KeepOpen",
 "PrivateKeyPromptForPassPhrase": false,
 "EnableLogging": true,
 "ColorMode": 1,
 "LogOverwriteMode": "Append",
 "AlwaysAcceptFingerprintDefaultBoolean": true,
 "Username": "xxxx",
 "Host": "xxxxx",
 "MaxScrollbackLines": 9999,
 "ColorANSIBlue": "#0086FD",
 "ColorDefaultForeground": "#F0F8FF",
 "FontMac": "SF Mono",
 "AlwaysAcceptFingerprint": true,
 "FontSize": 13,
 "ColorDefaultBackground": "#270603",
 "FontMode": "Override",
 "LogMode": "AllPrintableOutput",
 "AfterConnectTerminalMacros": [
 {
 "Macro": "{CTRL}C"
 },
 {
 "Macro": "{CTRL}C"
 }
 ]
 },
 "VPN": {
 "Mode": 5
 }
 },

(Sorry, when i pasted the JSON it removed all the indenting for some reason)


Here is the GUI and the + button is greyed out.