I just got a koyo radiator to replace my pwr which broke when a pickup backed into me. and I am noticing that unlike the PWR and the stock that there is a bit of a difference in the design. the top now has a funnel on it to fill with coolant in addition to the another open orifice. I am wondering if I was shipped the wrong one? it is as if now I have two places to fill the radiator wit coolant and now require a second radiator cap?! any info woudl be great thanks.