Pergo 9 Volt Adapter Block

In short, print, then drill the holes to make a good pilot hole for the screws.
Cut off the end of a 9 volt plug-in adapter and secure the stripped leads to the holes before putting the screws back in. It's best if you run the screws in and out a few times so that you don't cut the wires with the screw threads. Make sure you get your polarity correct. the + is the smaller male connector on the battery and the - is the female snap.
In most instances you may have to cut an exit path for the cable through the battery door.
If you need extra space for the cable on the bottom of the "battery" then shrink (92-95%) your z axis to make the block shorter. Remember you need the width of the squashed wire plus the block height to keep the screws pressed against the contacts of your device.
If you printed it too short, maybe you can just not screw the screws in so far to compensate.

Print .2 - .3 with 4 shells (this provides enough support for the screws
Maybe 8-20% infill
I had a bit of