Another view of this image.
http://www.ww2incolor.com/german-armor/KTiger-Turrets.html

Tiger II turrets at Henschel Factory (Second shot)

This prototype vehicle is the Ardelt-Rheinmetall 8.8cm PaK 43 Waffenträger. The idea behind this weapon system was a self-propelled mount for the powerful but heavy 8.8cm antitank gun, as towed versions of this gun were too cumbersome for crews to move readily. The idea was that the gun could be dismounted if need be or used directly from this mobile plaform. Ardelt and Rheinmetall build the first prototype and tests were conducted in April, 1945 but it never saw operational service. 

Tank hunter prototype

Caption of the PK 698: "Flanders, moving reinforcements to the coast in the first days after the beginning of the Invasion, here parts of the 1st SS-Panzer-Division 'Leibstandarte Adolf Hitler' "

The vehicle is a mobile Flak with trailer, probably carrying ammo.
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Evillittlekenny