How would I place CAN termination resistors in a 3 ended configuration?
CAN was designed to be a bus, not a star topology network. Because of this non standard configuration it might be difficult to get the speeds that you want due to reflections, but because of the short line length of 2m, each line could be considered a drop, and the recommended limit for drops at 1Mbps is 2m.


Source: Elektromotus CAN bus topology recommendations
v0.2 rc2

Add the option to terminate the devices by adding a resistor, then experiment. I would terminate only one device, only one termination resistor is needed in a CAN network, check the ringing on the lines.  If there is too much ringing it might be beneficial to add two termination resistors on two of the devices and experiment with the configuration.

More than two resistors is not recommended because it exceeds the rated load on most transceivers. 


  There should be no more than two terminating resistors in the network,
  regardless of how many nodes are connected, because additional
  terminations place extra load on the CAN transceivers.


Source:  Elektromotus CAN bus topology recommendations
v0.2 rc2