It may not be for power... I'm basing my assumption on this blurb in Compute magazine:
Ronin H1000 | Amiga 1000 | 1MB-4MB | 1-yr. warr | $600 (1MB)
Internal board for use with the H1000 accelerator board; includes adapter harness for power supply
I can say this about the card: It looks to be in perfect condition. The Hurricane it came with does work (had a broken pin but easily repaired)
The machine will not boot with the RAM board installed. It doesn't even try. I don't think it's broken. I think something is missing or mis-configured, and that leads me to the mysterious 2-pin connector. It's keyed as if it uses power somehow.