Install rear bench in 1987 W460 SWB

I have a 1987 W460 300GD SWB (VIN is WDB46033217056989, REAR BENCH DELETION is mentioned in the option list but on the title it is written 5 seats so I would like to add the rear bench) and I would like to install a rear bench in it. From what I saw on EPC I need to install A4609201362 and A4609201462 named "CONSOLE LEFT and RIGHT" and there are these parts that go with it
N304017008021 SCREW CONSOLE TO WHEELHOUSE
N000125008443 WASHER CONSOLE TO WHEELHOUSE
N912004008102 LOCK WASHER CONSOLE TO WHEELHOUSE
N913018013200 PROTECTION CAP CONSOLE TO WHEELHOUSE
What I do not understand is, do I simply need to screw the console to the wheelhouse (one screw seems a bit light to me), or does it need to be soldered?
Thanks







