Assuming no one has received a Baylor secondary yet (the first day to submit AMCAS this year is June 18, correct?), you won't get very useful info. from past applicants --this is the first year Baylor has joined AMCAS, and last year they just had one primary application, so I'm not sure how they may change it to fit into a secondary. Actually, because AMCAS is extremely different this year, I think many of the secondaries will be changed substantially, because otherwise there would be too much repeat info. between AMCAS and the secondary.
Last year, Wash U's secondary was online, and Baylor had the choice of paper or online apps.