NeuEnergy battery tray ?

[mkrusedc]

I have a 5s NeuEnergy batt that I need a battery tray for. It's sides are 52mm and 43 mm. The wider sides are what I would like to lie it on but those are the sides with wires. Would it be better to buy the tray for the smaller sides so that there is less of a chance to damage the wiring? Or could I just put some padding in the tray and put it on the wider side? And last, should I buy the tray about 2 mm larger for a good fit?

thanks