My B1SAT is on a dish fixed on 87W, which is three degrees east of true south for me. The connector is at the top, or up. It could also be on the bottom, or down, as Iceberg had his, wouldn't matter. There's actually a little polarity mark on the LNBF if you look carefully, but its really hard to make out. It really looks like a manufacturing joint, but I believe it is supposed to be a mark. That's what I used to figure it out (and looking at the probes inside the feedhorn narrowed it down to either up/down or left/right

)... Only annoying thing about this LNBF is that the feedhorn cover tends to keep falling off (it doesn't fit sungly). I want it to stay on, as bees will take up residence this time of year if they're given half a chance.