Found this regarding the use of Priest Kangaroos for Operation
TOTALIZE, 2nd Cdn Inf Div and 51st (H) Inf Div, were both allotted 36x Priest Kangaroos each. (the 72x converted Priest M7 105mm SP's divided in half) - 36 to 4th Cdn Inf Bde and 36 to 154th (Highland) Inf Bde. Also the AWD that carried out the conversion of the Priest M7 105mm SP's to Priest Kangaroos, was set up next to an Ordnance Depot, which I think may have been an AOD (Advanced Ordnance Depot). More to follow.
Cheers