If your looking at the rear end of the quad. Look at the left side of brake system. You will see two bolts next to where the em brake cable is connected to lever. Remove those two bolts, I believe they are 12mm. The left side of the brake will come off leaving the area you need to cover. Take the block off and the two bolts(allen usually) and install it where you remove the stuff earlier. And hopefully you actually got the right one. I ended up buying one for the kfx400. So had to wait until the correct one came. Then you can remove the rest of the em system from your handle bars and etc...
larry