If Spain is neutral, the strait should be opened taking both Morocco and Gibraltar
But if Spain is not neutral (I mean, after is attacked by someone), the strait should be opened taking Spain and Morocco (because Gibraltar garrison will have then a very hard time trying hold the rock, for not talking about blocking ships, and south edge of Spain is nearer to Morocco than Gibraltar)
You could say the same for Kattegat (or whatever name has Danish strait): if Sweden is still neutral, the combo is Denmark+Norway, but if Sweden is at war, the combo should be Sweden+Denmark (and this is even more clear than Gibraltar)
Let’s hope that Larry gives to the neutrals a proper treatment or we are going to have a fantasy scenario again