Anyone modified the boot floor on an MG5 SR? What size bolts are they?

[Petriix]

I'm looking at installing a raised floor in the boot of my 2020 SR Exclusive. Has anyone done this?

There are four bolts poking up from the boot floor, to which the foam surround is anchored with some flimsy plastic 'nuts'. Thees seem like an ideal place to bolt a wooden frame to support the raised floor. But they're a weird size - bigger than m6, smaller than m8.

Before I go out on a limb and source some obscure m7 bolts, can anyone confirm whether these will actually fit or tell me if they're an even more obscure size?

 

[Jomarkh]

I raised the floor on my 2021 SR Excite using 80mm polystyrene foam and 15mm plywood. I have some pictures that I can add but they are on another device.

 

[Severnless]

Here’s the solution that I came up with a while ago, they just slot together which lifts the ply flooring that I made to the hatch opening height, no need to bolt anything in