Retrofit electric windows to a 6y2 'classic'

Hi all

I've decided to take on the task of retrofitting front electric windows to my 'classic' model mk1. I'm having some difficulty researching what is involved with the wiring from the doors

I have - regulators, motors, door wiring harnesses, control switches

I know I will need the wiring from sills. Does this connect to the BCM or is there another module involved ? Does anybody know if my BCM would be up to the job or if that will need to be replaced too? Are there any wiring diagrams that could help me make the wiring from the sills, as unless I get lucky and find one in a scrapyard to pull apart, there aren't any on eBay. If I know what wires need to go where I can make one up

Many thanks for any info!