C4 mk2 2011 1.6hdi front parking sensors & footwell lights plus remap

Hi Guys, I have been lurking in the forum reading the posts but haven’t found any definitive answers so hopefully someone can advise me. Thanks in advance.👍

I have purchased some standard fit led footwell lights and can see where they fit but can’t see the wires . Does anyone know if the wires are present behind the trim so are just plug and play?, if so where would they be.

I wanted to fit genuine parking sensors that would integrate into the standard screen but have read that the kit Citroen sell 9690.01 is just a meta system kit. So if I purchased a genuine parking Ecu part no.9800409680 which is for front and rear sensors. Would this integrate fully? And where is the parking ecu located as I currently have just rear sensors.

I have become a premier member and wondered which companies carry out ECU engine remap as cant find them in the list.