I have a 46 M Farmall. Ordered "Gage w/cap" from an outfit. Talked with them on the phone first. I understood I would get the cast screw-on cap with dip stick rod attached. What came is just the rod with washer brazed near the top. The rod appears to be about the right length and about 1/8" diameter and is obviously an old dip stick with a full mark. The rod is used which I understood. I have a cap with no rod (on the tractor which is at another location so I can't look at it now). How did the rod attach? I remember looking inside my cap and saw no obvious way a rod used to attach. Can I make it work or will I have to try and send it back and hunt for another?