How do I jump start a Citroen Xsara Picasso FROM the same model?

I have 2 Citroen Xsara Picassos (2004).

The battery is dead in one of them and I need to jump start from the other.

As you will know there battery is a funny set up on the Xsara! I know there is a + jump terminal is under the bonnet and an earthing screw by the bonnet catch. So on the DEAD car I assume I connect red lead to + jump terminal and the earth the black lead.

My question is how do I connect the jump leads on the LIVE Xsara under the bonnet? Is this possible?

Unfortunately due to where the car has died I cannot connect LIVE battery to under bonnet terminals. I can't get the car close enough to link up.