Bill Dube's Electwik Wabbit Pictures Battery clamp picture and description
    Here is a shot of one of the brackets that I use to hold down my YTs. It fits in the space between the batteries and grips the base between the "beer cans." 1/4 - 20 socket-head cap screws go through the tubes on either end. The "end" units (this is one, but not quite finished) have the tubes offset slightly and the "feet" trimmed flush on one side. The "middle" units have the tubes welded on centered. The feet ara as you see them, but there are fillet welds on both sides, not just one. 

    Keep in mind that this is one of the uglest brackets. It is not in my car, you notice. You can't see them when they are installed, regardless. 

    These are installed by taping them to the side of a battery and sliding the next battery into position. Holes are drilled using a 12" long 1/4 bit in the open space left by the rounded corners of the two batteries. The drill is guided by the tube on the end of the bracket and makes a hole in the bottom of the battery tray. A bolt is inserted and the other side is then drilled. Nuts are then put on from below. 

    Nothing shows on top of the battery or is anywhere near the posts and wiring when using these clamps. The bracket shown is stainless steel, but any material of sufficent strength could be substituted. 

     Installing the last battery in the tray takes a little planning. If you have universal posts (with side "GM" style female connections) must must be especially careful. The next-to-the-last battery must have these connections facing away from the last battery. (You must plan ahead to make this happen.) You tape brackets to both sides of the last battery. You tilt the top of the last battery towards the next-to-the-last battery. Once the feet of the bracket are below the top of the next-to-the-last battery, you allow the last battery to "untilt" and rotate upright. You then lower it the rest of the way in. Gripping the last battery by the corners allows you to lower it all the way without smashing your fingers or dropping the battery the last inch.