After you buy an Optima battery for your Scion, the positive cable doesn't reach anymore so here's the DIY to fix that problem:

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MATERIALS NEEDED:
1"x2" strip of aluminum 1/8"thick (this can be found at a hardware store)
(1) 8mm x 1.25 x 20mm bolt
(1) 8mm x 1.25 nut
(2) 8mm or 5/16 flat washers
(1) 8mm or 5/16 lock washer
Red locktite
tape measure
metal saw/die grinder/snips
drill with 5/16 bit or Unibit (my favorite)
marker
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Let's begin now:
First I measured out the piece of aluminum to mark.
I made a 2" line for cutting. (I never said I could do a straight line)
It should look like this now.
Now it's time for the marks for the holes. I measured 1/2" from the out side edge on each side and put a dot dead center in the aluminum. (hint: the aluminum has lines running thru it so that you can know that you have it on the correct mark. In this picture they run horizontal.)
Drill a 5/16 hole at each mark. You can check this with your bolt to see if you are done. Using the unibit will give you a better look.
Here's after the holes are drilled.
I cleaned up the edges a little on a grinder and sander but that's your preference.
Here's the finished product installed:
If anyone doesn't want to make them but wants one I'll do it for $10 to cover the cost of materials and shipping. I do this as a hobby. Thank you and I hope it helps.
Jason