Help automating metadata options for AWS S3 Upload

Hi, I'm trying to automate adding metadata when uploading a file to my Amazon AWS S3 account. I want to

  1. Open/Expand the Properties section (This part is working)
  2. Click "Add Metadata" button (This part is working)
  3. Select Type: "System Defined" (Here's where I'm stuck, I can't get this dropdown menu to open and choose the option "System Defined".)
    Same issue with the next two choices:
  4. I want to then choose Key: Content-Disposition.
  5. I want to then choose Value: attachment.

Here is a video of me clicking through the choices for what I want this macro to do.

Test Add Metadata to AWS Upload page.kmmacros (12 KB)

Tried Find Image action?