Hi "i've no idea".
If the front panel connectors you're having problems with Are to switches, LEDs or the speaker, then don't worry too much about the orientation. The switches and speaker don't care at all, and if you get the LEDs wrong all that will happen is that they won't light up, so you then simply reverse them. As for the audio connectors, my approach would be simply to solder in a length of wire to extend the cable. Motherboard sound circuits are generally at the back of the motherboard simply because that is where the main connectors are and so this minimises any pickup of digital noise onto the sound. The case makers, on the other hand will generally want to keep their cables short to minimise the clutter of cables. In the case of the audio cables I think Antec failed to realise that audio needs that little extra.