well I found something via 9th W-SS book bei Herbert Fürbringer to add to Martins post

Panzer-Flak Schlacht bei Cambrai am 2.9.44 some 200 Allied tanks encountered ..........

facing 18 8.8cm from the Flak Abt. Attack at 10.00hrs, SS flak HQ hub at Bourlon and holed up there at 17.00 hrs after Allied armor break through to the north at 15.00hrs and to the south at 14.00hrs. If I understand this map correctly disposition of the 8.8cm's were north from just east of Buissy south to on the southern end of Havrincourt and in between the heavy Flak were Pzgrnd's. Position to meet the Allied armor thrust was east of Canal du Nord, due to the final breakthrough by Allied armor the 9th Ss werfer and Artillery and recon moved into Cambrai as a way of escape. The 200 tanks were US with protecting infantry on the flanks. The 88's started fire from 3,000 metres with werfers and the 105mms pinning down the US infantry. In several hours of bitter fighting 40 US tanks were destroyed this right before the Allied breakthrough at 15.00hrs. The 88Abt. packed up and were moved NW to Neuville and Nordrand while the 4th was protecting with cover fire of their 3.7cm AA Fla, which finally during the withdrawl moved back into the c ity and south for the last defenses and the last bastion of arms as the W-SS wounded escaped......

my loose translation of the German