Qt Signal Slot Same Name

Hi guys.
I have started using QT 5.0.1 recently for a project at work, and I just realized that if I create a slot function with the exact same signature that the designer would have generated when using 'Go to slot...', it gets called even if I don't explicitly assign anything in the signal/slot editor.
It works on both window and linux with both MS and GCC tools configured.
I assume this connection is done by the moc, but I'm not sure.

Qt Signal Slot Parameter

So my question is; is this a reliable way to do it, or should I explicitly assign the signal/slot in the designer to make sure it works correctly on all platforms, and in the unforeseeable future?

Qt Signal Slot With 2 Arguments

C++ Signals And Slots

How Qt Signals and Slots Work - Part 3 - Queued and Inter Thread Connections. That event will call the slot the same way we call them for direct connections. All the information (slot to call, parameter values.) are stored inside the event. Which is called by QMetaObject::activate to prepare a Qt::QueuedConnection slot call. The receivers of signals are called Slots in Qt terminology. A number of standard slots are provided on Qt classes to allow you to wire together different parts of your application. However, you can also use any Python function as a slot, and therefore receive the message yourself. Consistency is important when naming your resume, cover letter, and other application documents, so use the same format for each. For example, if you simply use your last name and a description of the document for one title (“Smith Resume”), use the same format for all your other materials (“Smith Cover Letter”).

Qt Custom Signal

So my question is; is this a reliable way to do it, or should I explicitly assign the signal/slot in the designer to make sure it works correctly on all platforms, and in the unforeseeable future?