Battery Lid
First obtain a remote and then take out the lid to the battery compartment. Then take out the batteries and set aside
Money
Get the cash you wanna hide and fold it into a thin rectangle
Insert Cash
Insert the folded money into the battery slot
Batteries
Insert the batteries back into its compartment with the money falling underneath it
Lid
Put back the lid and make sure the remote works, one way is by using the front camera of your phone while pressing buttons and the LEDs light up
Use As Normal
Do the same for other remotes and use as normal