Dear Customer,
Sorry that we do not install the distro plate of C700m to C700P, so we are not sure whether it is compatible or not. But you can download the installation guide of BPTA-WDP700M-KIT, and check the distance between the top wall to the middle plate of the C700P chassis. If it is longer than 385mm, the distro plate will be not compatible with the C700P. Because the length of the dirsto plate is 385mm.
If you have any questions, feel free to contact us.
https://shop.bitspower.com/index.php?route=product/product&product_id=7852&search=700m