Hi Roy,
I can't help with the actual mounting information, except to say that the standard No. 19 wireless mounts and antenna bases were certainly used.
However, I will say with almost certainty that in Canadian service, the vehicle would not have had a US radio (unless it was set up for some sort of special liason mission).
You might find some mounting ideas here:
The Wireless Set no. 19 If you surf around on their site, you can find a ton of photos of No. 19 sets in all sorts of expedient and design-purpose mounts along with the associated equipment and accessories.
Good hunting!