Actually, there are different ways of doing it. I am no expert as the effects issues are still blurry to me. I toy with others xml gauges, don't change them, just see what they control and there timings and experiment with other fx.
Some FX are handled by XML gauges, others by entries in the .cfg file ( either in the LIGHTS or in the SMOKE sections)
On my Viper that I have toyed with, I have activated my wingtip contrail in the SMOKE section of the acft.cfg
Positioning the wingtip contrails is a burger. ANy FX on an acft. really.
What B-58 is it? I have a Hustler that I might toy with. Been playing around with the effects for my favorite Tomcat right now.




