You can use the tContextLoad component to create key value pairs of contexts to be used in your job or child jobs.
In your case you would want to use a tFixedFlowInput component to specify what you wanted (or this could be any input really but this is just a way of hard coding it directly to the job without needing an external resource) and then link that to the tContextLoad component with a schema of key and value like so:
You'll want to use your original code snippet as the value in your tFixedFlowInput component:
In the first screenshot above I've also added a tContextDump component and connected it to a tLogRow so you can see the available contexts to the job: