This may be relatively unknown in Alteryx, but I figured I would see if anybody could help. A little background first. We want to call workflow from Salesforce when a user hits a button. That button will send, via api, an ID from the Salesforce object to a workflow I have built. The api process will be built out by software programmers at a later date. Then that ID would ultimately be used in the 'WHERE' statement of the Salesforce Input tool to get only the data associated with that particular ID. The workflow will run using only that ID's data and then send back a result to Salesforce via the api process. Currently, I am trying to understand the part of this process where the dynamic ID value from Salesforce can then be used in the workflow Salesforce Input tool. Below is a picture of the part of the workflow I am currently struggling with in designer. I am using a simple text box as the input for right now, and will replace it will the value from the api when the time comes.
My question is, what is the correct process to get the value from the PASS_ID text box (ex. a2C5b000002iPGP) into the Salesforce Input node and run it successfully, only getting that ID's data back from SF?

Note: I am using the deprecated version of the SF input on purpose.