Option keys are tied to the endpoint by serial number, it cannot be transferred to another. You must purchase a new option key for each endpoint using it's serial number you'd like it to be on.
The only way you can transfer option keys to another endpoint is if an RMA were performed, and you had to replace a defective endpoint with a new one. You'd specify the old serial number and the new, and it would transfer/generate the option keys you can install on the new endpoint.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.