No, nothing will happen, it's digital data, 0s and 1s, they either pass through or don't so quality and corruption have nothing to do with this, unlike an analogue signal.
So this will not affect your data, however, it may affect your cable itself IF the heat made by the card is enough to actually melt the cable you could get a 90 degree angled Sata cable which has a connector angled at 90 degrees, here is one:http://www.newegg.com/Product/Product.aspx?Item=N82E16812119231&cm_re=90_sata-_-12-119-231-_-Product
Connect the bent side in that port and that would make it further from the card,
You don't need to do this unless you feel that the heat may melt the plastic,
OR you could get a PCI Sata card, but that would expensive and stupid.
So anyways, you are okay but only if you feel that the heat can actually melt it you should get a 90 degree cable, and also, he air intake side is cooler than any other part of the card such as the exhaust so I strongly doubt that it can melt it.
So, you're good.
Best answer Plz. I'm the only one who bothered answering this.