Sold my cobra intake and got holley systemax. I didnt remove coolant line nipple that threads into lower intake on rear passenger side. The small coolant line goes from heater coolant hardline to the nipple threaded into lower intake. On my used systemax lower it was plugged off do i need this small coolant line and the nipple. If it needs to be hooked up where can i find the threaded coolant nipple. Thanks