Sounds like we will be in both classes together. The first letter (for the ATP-CTP) has in the scheule block 1 day for the ATP Knowledge Exam, indicating it is the FAA test. Notice also the bullet point "Upon successful completion of the course and the ATP written, you may be accepted into the next available New Hire First Officer class scheduled." While pehaps you can go anywhere to take the exam, it seems prudent to take it asap after the ATP-CTP so you can get into the scheduled class the following Monday. And be prepared to pay for the exam ($165.)