Hello va3ets,
Hauptwerk does have native support for the original Launchpad models (including control of their buttons' internal lamps). To configure that, you would normally right-click on the desired virtual stop select 'auto-detect' and then follow the on-screen instructions in the wizard to press and release the button on your Launchpad that you wish to map to that virtual stop. That would need to be done separately for each stop that you wanted to map to a Launchpad button.
However, since right-clicking on the virtual stops (which are graphical) probably isn't feasible for you if you have no sight, then you would instead need to do it by going to the 'Organ settings | Stop/coupler/tremulant switches and pistons/buttons' screen (from the main menu, with the organ loaded), then navigating to the desired stop by name in the (left-hand) browse list of stops, then pressing its 'Auto-detect' button (which is in the right-hand pane).
Novation actullay changed their MIDI implementation a bit with their 'Mark 2' models (including the Launchpad Pro), and Hauptwerk doesn't yet have full support for that. However, my understanding from Launchpad Pro users is that the Launchpad Pro buttons do still work with Hauptwerk's auto-detection, except that their buttons might not light up in the intended colours:
viewtopic.php?f=3&t=15809&p=118593
viewtopic.php?f=4&t=14814&p=110504
... but that probably wouldn't be an issue for a non-sighted person.