The Tiger had a tool for adapting starter devices to its engine. The tool was carried on the rear wall.
The kit provides one part to represent the adapter, this one, part D3.
But the Tiger used four different kinds of adapter during its two-year production run, and unfortunately this kit provides the wrong kind. It's a 1944 adapter, which you would find on a "Late" Tiger.
This photograph shows the kind of adapter that you would find on an "Early" Tiger with a HL230 engine. It's possible to correct the kit's adapter to this version, by scraping away some of its surface features.
But, for a Tiger of May 1943, it's also possible to have the older HL210 engine. That engine's adapter had only one hole, the central hole. It would be difficult to edit the kit's part to represent that version.