Alex,
While the Multi-barrelled Smoke Discharger is not mentioned in the 2 March 1945, Handbook for the Flame Thrower Transportable, No. 2, Mark 2c, images of the mount can be found in the 11 May 1945 Addendum No. 1 to the above handbook (which is the fitting instructions for the supplementary armour).
The Multi-Barrelled Smoke Discharger is described in detail in the 1950 Canadian Army Flame Training Manual, for the Flame Thrower, Transportable, No. 2, Mark 2c (Wasp 2).
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