When to send the switch inventory to Organteq on startup?

After midifying an old analog organ and connecting it to Organteq, I hit a minor challenge. When should my midi controller send the switch and potentiometer inventory to Organteq at startup? I have bistable stop switches, and obviously I need to synchronize Organteq with the current settings on startup, but when? I was hoping for some kind of ping and set my firmware up accordingly. I did not investigate, but apparantly the midi organ does not receive any midi signals from Organteq. I now wait for 20 seconds after an established USB connection to send the inventory. Until then Organteq has safely come up.

Is there another solution or best practice? Thanks

Peter