Wassell and sip speedo

Hello , just trying to get my wiring installed on my build and just wondered if anyone had any info and experience that has worked . I wanted to have a live suply to the speedo and lights but have been informed that I need an A/c suply for the Rev counter . Can I just splice in the brown into one of the yellows coming out of the stator and then connect the red to a fused battery suply and black to earth . I've read that some have had problems in setting this up and also getting all the functions of the sip to work . I don't want to fry the speedo by connecting wrong . Anyone with any tried and working experience of this I would be grateful of any input to put me in the light
Thanks in advance

Thanks in advance