Can anyone tell me where to find the IR receiver on the front of a Thomson Sky + box?

I have set up a Slingbox with my Sky + and I can receive the signal on my laptop, but I can't control the box with the IR cable that runs from the Slingbox.

You have to position the two IR senders from this IR cable directly above and below the IR receiver on the Sky + box, but I can't see anything on the front of the box that looks like the 'traditional' little window for an IR receiver.

Any idea where exactly on the front of the box the IR receiver actually lives?