How do I install a rear wiper relay?

[EwanMacPherson]

Hi There,
I have recently transplanted some rear barn doors from a Tourneo Connect 2006 LWB to my regular Connect LWB van, was easier than putting in rear windows.

To my surprise the wiring was there and I have a new wiper control stalk which should include the rear wipers.

They are not working so far and I understand I'll need to install a relay to make the rear wipers work but there is no working socket for a relay or fuse in glove box or engine fuse boxes. The corresponding empty spaces have no wires to them.

Can anyone tell me how I can get my new rear door wipers working? E.G do I need a new fuse box or can you get relay sockets? Or something else..

Thanks in advance.

Ewan