What I mean is this, according to the spec sheet you have above, the PIR sensor has brown wire to neutral, a blue wire to live input, and a red wire to live output.
If you purchased just a 7 pin female (like on your truck, right hand side of the pic below), then your would wire the PIR sensor to the
sensors brown wire to the #1 white of the blade end
sensors blue wire to the #4 black of the blade end
sensors red wire to the #3 brown of the blade end
Then all you do is plug your RV into the female end and all is connected. When you don't want the sensor, you just unplug it and store the blade end somewhere.