Hello Samson ....hope ya well mate
I ru the wires from my van battery into the back of my van to power my pumps, why would it not be possible to do the same on a Picasso
Depending on we're the battery is situated find a path to run the wires ( I drilled a small hole put a grommet In it to prevent the wires rubbing on body work ) through, u will be able to run it under the carpet somewhere or tucked away out of sight.