We have an 08 Elddis Odyssey with the BPW / winterhoff hitch. There are two obvious grease nipples on the top (through a hole in the faring) and that seems to be all. I often see references to an additional one underneath, but I can not find it and I have looked carefully. Am I correct, there isn’t one on the BPW, or am I missing it. Perhaps the references refer to the Alko? I have the BPW maintenance handbook, but it is very vague and general.