How do I install a windshield regulator ?

[V8Germany]

Dear All,

My 1936 Fordor has no windshield regulator,
the previous owner just installed a threaded rod with a handle.

Now I got a regulator from MAC to bring the car back "original "
and thought it is easy to install 😌
4 screws and done....

Well... the MAC assembly is to large/ wide for the gap between dashboard
and window frame....

Do I have to do something with the dashboard or can I sneak the
assembly in from below ?

Thank you for your help :-)

BB