Therefore we must assume that this new slot/duct serves not only as a method of providing additional cool air, but has also been added as a short term solution in relation to the failure saw in Singapore. Afterall Singapore is the most demanding circuit on the calender for the driver and so one would assume if extra cockpit cooling was required, it would have been tailored for that track.
The failure which prevented Nico Rosberg from partaking in the Singapore GP was thought to be caused by contamination of the steering column loom by the team. However with the team eager to allay any fears of a repeat of this, the slot may have been added to cool the region before team members clean the loom. With a short being likely being caused by wire exposure (due to heat stress) coming into contact with cleaning fluid.