With any adapter meant for a IIsi, make sure there's no FPU chip installed in it. The IIsi didn't come with an FPU, and the SE/30 did. So if you put a IIsi card that has an FPU on board into an SE/30, the SE/30 won't boot.

Usually these FPUs are just socketed, so you can remove them and then use the card in an SE/30 with no problem.

The card you have posted pics of may not have an FPU, so this issue may be moot in that case.

Best,

Matt