F/C 15 fitted for wireless

[dirkM4a4]

Hello,

In the book Canadian fighting vehicles i saw pictures of standard F/C 15's that were "fitted for wireless". On the outside they look just like ordinary F/C 15's but inside the cargo area apparently there was build a wireless installation.
Does anyone have information about how it was built, which transmitters were use, or even better pictures? Because with the tarpaulin on it's impossible to recognise anything.

Cheers,

Dirk