How to Fix Loose Pickups on An Electric Guitar?

If pickups fell out of place, don't worry.

STEP 1: Release the strings.
 

STEP 2: Loosen the screws on both sides of the pickup and take the pickup out.

STEP 3: You can stick the sponge behind the pickup and use the height of the sponge to push the pickup, if you don't have a sponge, also you can add glue to this side and fix the pickup with glue.
 

STEP 4: After the pickup is fixed, reinstall it and tighten the strings.