One of the decal options in this kit is "Tiger 233" of the 505th battalion. You can customise the kit for added accuracy if you want to.
This Tiger had a custom-made curved storage box, attached to the back of the tank's built-in storage bin. This is a photo of Tiger 233 and its box. Unfortunately no better photos have been found.
The kit does not appear to include this box (based on the pre-release images) so you could scratchbuild it.
Another possible change you could make, is to add the barbed wire that Tigers of the 505 carried on both sides of their hulls.