Planet aspecting a cusp vs planet aspecting lord of the cusp

Hi @ernst and friends,

I have seen the Aspects to Bhava Chalita cusps table in VoTH chart calculator and in Kala, but so far haven't given it any consideration in chart analysis.

How does a planet aspecting a cusp impact that cusp? My guess - auspicious lords aspecting cusps would be good, Ju/Me aspecting would help manifest things of that cusp. In what ways does it work differently if the planet is aspecting lord of that cusp?

If there is a particular course where this is discussed explicitly, please share, I will check it out.