I recently added a few t5's to my led system and liked it so much I ordered one more bulb and ballast to retrofit. I didn't have a problem wiring the two bulb setup but this is different. The ballast has two red wires and one yellow one. How do you connect that to two endcaps? Shoudn't there be two blue wires and two red wires that go into each end. Also, is the yellow supposed to be a ground? Any advice from electricians or t5 experts is greatly appreciated. Btw, the ballast is a workhorse 3 for a single 54w bulb and comes with no wiring instructions, boo. Thanks in advance! Todd