The model would be pretty similar to a Banshee type layout. e.g. 4-bar linkage, with the shock connected between the front triangle and rear triangle. The 'very long link' that I described is one of the two intermediate links of this 4-bar model. The other intermediate link is exactly as on the actual bike.
Where this VLL pivots on the front triangle in the model should be the same position as where the slider pivots on the front triangle (on the real bike).
Where the VLL pivots on the rear triangle (in the model) can either be up high and far forward, or down low and far back (it doesn't matter which you choose), as long as the line of this VLL is perpendicular to the slider of the real bike.
So, to answer your question, because this swingarm pivot is part of the swingarm (even though it is a long way away from where the swingarm would normally be), it still moves with the swingarm as the suspension compresses, so line of the VLL will remain perpendicular to the actual slider.
