If the straps are under the driver side trunk lip I am guessing that those straps are for the plastic tank used for the US Evaporative emission control. The Tool Kit was just a small black plastic sleeve with a wheel wrench, a couple of wrenches and a spark plug wrench.
Can somebody post a photo of an original tool-kit for a 1970 - 1750GTV? I currently just have the wheel brace and jack wrapped up in some rags and clipped into the boot (trunk for the Yanks). Is there more to the "kit" than that?