The antenna cables block the slots in the midframe. In this step, you'll shift them down to make room for the cards to slide underneath the battery.

Use tweezers to grip the black antenna cable in front of the right slot in the midframe.

Gently pull the antenna cable to the right and use a spudger to press the cable down and out of the way of the slot.

Repeat for the white antenna cable in front of the left slot in the midframe.