The underbody view is like this:

I assume that the subframe actually refers to the whole part I've shaded in blue below, and that the correct jacking point must be the red cross, as this seems likely to be the most structurally sound part of this member - but this seems a long way back and a bit awkward to get to, especially if I'm going to use "an interposed block of wood" as haynes suggest.

So, is this the right point to use or are there alternative safe positions closer to the front of the vehicle?