Read the job posting carefully! They pull resumes through a computer system and you have to match up a certain amount of words in your resume/cover letter with what they have posted normally.

This means tailoring your resume to their posting.

Normally there is a spot for a cover letter- either put into a text field or an upload. No need to add transcripts, just attach/fill out what they ask for(again tailoring to what they have posted in the job description for best chances of your resume getting pulled)