IBM 3 User Manual page 241

10. Open both tractor doors.
11. With the side of the forms you want to print on facing the front of the printer,
insert the forms through the rear tractor paper door, guiding the forms over the
forms tractor.
12. Align and put the left tractor holes of the form over the left tractor pins. Be
sure the forms pass under the forms jam sensor and that the forms are straight.
Chapter 17. Setting Up Forms Paths
231