I'll explain my earlier post a bit more in detail & hopefully shed some light.... no pun intended
Our Bongo had a Mazda kitchen fitted in a former life & still has the fan fitted in the passenger side rear window.
When we received our Bongo the kitchen had been removed & the rear light, centre light & window fan did not work.
On investigation the live feeds to these items didn't exist.
I was told that a main feed went to the rear of the Bongo for the kitchen & these items were fed from that main live wire.
When the kitchen was removed I presume part of the wiring loom was removed & therefore the life feeds to the two lights & the fan were disconnected.
Later when we had a side conversion done, these items were rewired & a live connection was fed from the panel of the PMS (zig) system & now everything works as it should.
I have never seen a Mazda cube kitchen so don't know how these items may have been wired up.
I can see how the fan would be related to the kitchen but as for the lights, I don't know.
All I know is that the wires just ended & there was nothing in the immediate vicinity to plug them into.
Nigel
PS Just had a thought, the cigarette lighter in the rear didn't work either & also had to be re-wired.