How to make a jbeam for a car?

I am wondering how to make a jbeam for a car. I have heard of people using NodeBeam editor and i am not sure how to edit/make a node beam structure. Any help would be appreciated.

 

if you want to pull your hair out by using the node beam editor fine
but i would not recommend it.
do a lot of research before.
and i mean a lot of research.
https://wiki.beamng.com/JBeam_Reference
https://wiki.beamng.com/JBeam_Introduction#Nodes
https://wiki.beamng.com/Beams
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The nodebeam editor just makes it easier to visualise where the nodes are in relation to the vehicle body mesh.
do not and as an experienced modder, please do not use it until you understand it.

 

so i have read the wiki articles and i dont know if this is possible to basically move the nodes to fit the model?