2. The dual-filter bracket has two holes for the flow of oil in and out of the filters. Based on where you're going to mount the bracket on your vehicle, select the most convenient hole with the arrow pointed IN toward the center of the casting. Install a hose fitting, making sure to seal the threads with Teflon tape or appropriate sealer. Install a plug (supplied) in the other IN hole. Do the same for the OUT holes. Now you can flip the bracket upside down and install the threaded nipple into the bottom of the remote oil-filter bracket. This is what the oil filters screw on to.