If a camera does not accept Timecode IN then we have to use a work around. Using a minitrx+ attached to the camera using our custom BNC to Minijack cable (TCB-42).
You drop the LTC output of the minitrx+ to MIC level and input the timecode on the camera's audio track. This provides a quicker and neater solution in post - for example in in Avid which can natively decode aux LTC from the audio track. It also gives you a visual way to check that the timecode is in sync across all of the devices, by comparing the displays/blinking lights.
We have put together a short video which demonstrates both of these solutions here: https://vimeo.com/161035962