Really, stop trying to justify a mistake. It's not befitting.
There is physically no way that Ikara could load from where you have it right now as there's nowhere the magazine could go.
You *could* however swap the Ikara and Sea Cat around, raise the quarterdeck to be full height having the Limbo pushed further aft with the relocated Sea Cat and then have Ikara feeding from a magazine placed in the superstructure.