Need Help! 1998 E350 Custom Cutaway 4R100 to S5-47 Conversion. Speedo / electrical Routing

[Scott2727 0]

My name is Scott. I have a 1998 E350 custom cutaway equipped with a 4r100 and Triton V10 modular. I picked up ZF5 and mechanical components. I'm working on details for electrical and speedometer requirements for conversion. Target /speed sensor located at rear axle is still to be determined of its function / signal. Looking to locate electrical diagrams.  No target / speed sensor on 2WD ZF5 housing. Also questions / advice pertaining to electrical routing / rework. Rear ABS equipped. Any good advice / experience in this matter is greatly appreciated. 9600 lb dry scale weight and 4r100 didn't seem responsible. Thanks for your time and have a wonderful day! Scott

Edited May 10 by Scott2727