Step 1 – assembling the chassis. You will notice that the radiator group is integrated with one of the spars and is glued here. Almost right behind it is part E41 – the notch in its middle should point to the rear and up. It’s one of the attachment points for the engine block. My advice: align and glue all the spars to one of the girders first, then attach the second one.
The small subassembly in the lower right of step 1’s diagram is the engine alternator, used in the next step.
In Step 2 you will assemble the engine and gearbox. They are both very inaccurate in terms of shape and detail, and the fit is less than good. Ridiculously there is a driveshaft between the engine block and the gearbox – the designer is obviously no a driver.