This product utilizes the two holes that already secure the rear of the OEM console in place. In the photo, you can see the two Tuffy bolt heads that use these holes (right side in photo). The longer and thicker bolt to the left secures the box to the FJ's sheet metal underneath, but you need to drill an extra hole for it.
You will need a long 1/4" drill bit to drill a guide hole, and a long 3/8" drill bit to complete hole. I used Dewalt extended length drill bits that were about 12" long. I used a long scratch awl as a center punch to start the hole. Although the Tuffy bottom rests on the plastic console, you will discover a significant space between the OEM console bottom and the actual metal you need to drill through.
Many owners do not feel this part is necessary, but this will give you added security. NOTE: As per the PDF instructions, you will place the Tuffy Console in place to mark the holes, but remove it before drilling.
Once the drill breaks to the other side, you will need to be careful to limit its travel. According to the instructions, brake lines are close underneath. Fortunately, I managed to drill right in between them.
The bolt end you see at the end of the red arrow secures the console well. You will need someone on top to keep the bolt head from spinning while you tighten the lock nut underneath. Neither the bolt, nor the nut are stainless steel. So I globbed silicone glue onto this, and probably will apply more tomorrow morning. I also used reusable Locktite on the threads.
I see a lot of members asking about the armrests. Of course, I had both driver's and passenger's. The top of the console sits closer to the passenger. You can see there is a metal tray between the Tuffy container and the driver's seat. Therefore, the driver's armrest is fine intact. The passenger one has to be removed for this box to fit.