The Speed Sensor Wire, needs to "Bypass" through your new toy.
Correct, Pin 26 on Plug 135 (grey-middle plug). Bottom corner pin, closest to the Blue? Plug.
Count the Pins either side to make sure you have the right corner Pin. (3 pins on side and 4 pins on the other.)
Cut the Speed Wire (green/black I think), about 100-150mm from you ECU.
One of your Monit Wires will solder to the ECU end of the Cut Speed Wire, the other Monit wire will solder to the Engine Loom end of the cut Speed Wire.
The Diagram your using is looking at the ECU Pins, I count the Pins either side of the Plugs Centre Hole. 3 on one side 4 on the other.
OK, the monit instructions say its connected in parallel rather than in series like you said? Are you sure that is correct? So one wire goes to GND and the other to the speed sensor wire according to them
OK, so I found the installation guide for the apexi rsm and it is really handy for what I need, Even shows you what pins and which way to look at them etc... So it looks like I was correct in plug 135 pin 26 but the gnd I need in plug 134 pin 8, According to the guide its the pins as you look at them while holding the ECU (as you said)
Now im off to see if I can start an electrical fire lol