How to pass array of linked table id through form in Rails?

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The Route model is connected to the Address model, via AdressesRoute, many-to-many.
You need to file a form for routes/new so that you can select the start and end address from two drop-down lists.
Should I specify address_ids or adresses_route_ids in route_params?
Tried params.require(:route).permit(:address_ids)
through collection_select gets one value from the drop-down list
if params.require(:route).permit( { address_ids: [] }), nothing gets into the hash at all.
With checkboxes, it turned out to write several id to address_ids, in the controller it was: params.require(:route).permit( { address_ids: [] }), and in the form collection_check_box {multiple: true}.
I don't understand how to add from two collections...