Best way would be to have a set of deck plans.
Second best would be to see if the kit has any big gutter-looking parts in it, then you could try that out.
Hard way, go search the yard photos available and sus out where they go from those. Since these were little more than bent sheet metal and metal mesh, they were often moved in the yards to better fit around various gear that had been moved or added.
A lot of effort for something everyone agreed was not very useful in an emergency.
Wish I could offer more in help.