however I am struggling to find the data sheet
For what? At least the receiver is clearly labeled. Ground and VCC are pretty obvious. The other pin is where the data comes in. Connect it to any pin, and use SoftwareSerial to read the data. The SoftwareSerial instance can use -1 as the TX pin number, since transmitting isn't possible.
I'd guess that the transmitter is equally well labeled, but the labels must be on the bottom. Again, use SoftwareSerial to talk to it, with the RX pin -1, since you can't receive anything from it.