I have exactly the same card in one of my SE, but without appropriate driver too :-(
There are several jumpers on the card, with explanation on the back (I tried many configurations to test...)
It works very well, but It seems the copro is not used (may be a patch is necessary...)
In using Speedometer, the score of the CPU is better (x2) but only a small gap for the FPU.
The score is better with the ROM on the card which run to 16Mhz.
It is necessary to keep at least 2 RAM (256Ko) on the motherboard to work.
Anyway, the difference in using the Mac is visible.
Last thing, in my card the proc is a 68HC000 version (low power for laptop), I don't know why ?