How do you put my oven door back on it's a whirlpool

Here's a link with procedures for removing and replacing the door. I've copied them below. If your husband didn't have door removal pins when he took the door off, all that is necessary is for the door to be aligned with the hinge brackets and it will drop down onto the bracket's pins. The door can then be closed normally. A second person to help align the hinge brackets with the slots in the door (and to keep the spring-loaded hinges from snapping back in) would be helpful.

Can't get Whirlpool Oven Door back on - The Kitchen Appliance Repair Forum

To remove:
1. Open the door about halfway. Insert door removal pins into both hinge hangers. Do not remove them while the door is removed from the range.
2. Close the door as far as the door removal pins will let you.
3. Rotate the door toward the range. Lift the door until it stops. Do not use the door handle to lift the door. Rotate the door toward the floor and pull it toward you.

To replace:
NOTE: The door removal pins you inserted must still be in both sides of the door.
1. Grasp the door on the sides with your fingers on the front of the door and your thumbs on the inside surface.
2. Rest the hinge hanger so that it is flat (at the bottom of the hinge hanger on the bottom of the front frame slot).
3. Position the door with the hinge hanger slots almost parallel to the front frame.
4. Push up and in until the hinge hanger slots become fastened to the range. Lower the door and rotate it slightly from the front to the back until the slots are fully fastened. The hinge hanger will be close to the bottom of the front frame slot.
5. Pull door open about halfway and remove the door removal pins. Save door removal pins for future use.
6. Close the door.

Here are some diagrams of the oven-door parts. It might help you see what needs to go where (or not).

Whirlpool Oven Repair Help and Parts