Max Max

Hello everyone, im forcing myself to learn houdini, i started watching some Entagma tutorial and basic stuff.
I want to take it slowly due to the amount of information and steep learning curve.
I am a Softimage user with experience with maya, 3ds max and other 3d platform, so im trying to grasp as much as i can from Houdini and make it my new toolkit.


I just managed to recreate the energy spiral by Simon Fiedler on entagma youtube channel ( https://www.youtube.com/watch?v=clGL-do0YNg&ab_channel=Entagma [www.youtube.com] ) for anyone who did not watch it.

My simple question is this, in the tutorial they use a line so from point A (start) to point B (end of the line) to create some spiral curve effect.
How would i approach to have a custom A starting point and a custom B starting point? Basically i would like to attach the curve lets say to a cube vertex and end up into a torus point and stay attached to those two, like for example a cobweb.

From my understanding i would have to calculate and tell houdini that the first point of the curve should be in the same place of the point i choose on that cube, and that the end point of the curve should be on the point i choose on the next geometry i want attached it to, ie a torus o something else.

How would i do this?

Thank you for all your help!

Max