Unsolved about node editor

which one jbeam or something to load the in game car to edit node?

 

Which part of the car?

 

i trying to add node at axle to frame on the semi
--- Post updated ---
the semi file is .zip and all are seprate are .dae .jbeam .pc and .json

 

to add a node to the rear axle go into the semi_suspension_R.jbeam file and go to either the semi_axle_R_1 (for the rear axle), or the semi_axle_R_2 (for rear rear axle) part. Once you have found the part you want, scroll down to the nodes section. This is where you can edit and add nodes.

 

the semi file is

Is there tutorial?

 

Probably, you’d have to have look. You can find info on the wiki.