the way thats done in the photo is precisely how i,ve done mine, the reason i did it like that was to make the column between Cp16 & the steering rack removeable without needing to remove the steering wheel or the rack itself, & also the part that clamps onto the triangulated part that is just below Cp16 has a locating pin too, so it all more or less keeps the original spec of the sierra column which must be good for the safety aspect of having a deforming steering column in the event of a frontal impact. also it helps with installing the engine as its easily removed by undoing just 2 bolts.
andy