About half way down, where it says:
in hospitium Metelli,
qui conspirationis erat princeps,
se contulit Scipio;
cumque concilium ibi iuvenum
stricto super capita consultantium gladio.
My translation is currently:
in the host of Metellus
which was the beginning of the conspiracy,
Scipio gathered up;
the plan of the youths was brought forward by those (de quibus?),
which he had found,
drawn by the sword above the heads of the conspirators
But this doesn't make any sense....