Yet they mean practical intellect: assent moves the will by effects
Intellect here = practical mind: faith's proper act is practical assent that moves the will.
Subjectively in the intellect, yet effective in the will through inseparable effects.
Latin
IV. Verum hic per intellectum, non mentem theoreticam sed practicam intelligunt: quandoquidem fidei proprium actum esse docent, non assensum quemvis, sed assensum practicum, qui voluntatem movet atque afficit. Ac proinde quamvis existiment fidem subjective esse in solo intellectu, illam tamen volunt esse in voluntate effective, id est, per suos effectus. Nempe, quia licet proprius ejus actus in mente recipiatur, multos tamen illa motus & operationes in voluntate excitat, quae necessario illam comitantur, & sine quibus vera & salvifica fides nec esse, nec dici meretur.