And just as the analytical consideration of a chariot that establishes it as a dependent imputation, allows one not to infringe upon the relative truth, and allows yogis to easily access the actual reality of things:
Just so the world at large agrees the self is based
Upon the aggregates, the elements and on
The sense fields, it is what assimilates these things.
Just as the chariot is imputed in relation to the wheels and so forth, where the assimilated are the wheels and other parts and the assimilator is the chariot, the self assimilates the five aggregates, the six elements and six sense fields, as the self is imputed in relation to the aggregates and so forth. This is saying that, just as a chariot is the assimilation of the wheels and so forth, the self is likewise the assimilation of the aggregates and so forth.
And just as this classification of the assimilated and the assimilator is a worldly convention, the classification of the roles of acted and actor is accepted in a similar fashion to the chariot. To explain:
Assimilation is the act and actor too. (6.162)
This presentation is saying that the assimilation (upadāna) is the act in the sense of the aggregates and so forth, and the actor in the sense of the self.