Sega NAOMI & NAOMI 2 guidance if you please?

[^Katsu]

I picked up a Sega NAOMI & NAOMI 2 Motherboard at Play Blackpool this weekend (both untested)
The NAOMI board has from what I can see has a damaged USB connector on the Mobo, however it does also have a USA ROM, PSU, and I think this JVS Adaptor http://jvspac.kirurg.org/img/io-838-13683-93.jpg. There are also a few other bits attached to the section of wood it's all pinned down on, not sure off the top of my head what these are? I'll take a few pics later this evening.

The NAOMI 2 is just the standalone Mobo (not sure which region Bios atm) and looks in good order so far?

I have a MVS/CPS2/PGM/Jaleco32/Jamma compatible Supergun with a PSU here, along with a NAOMI cart to play should I learn how to hook this beast up!
So I guess the question here is what do I actually need hooked up, to get this party (or repair) started?

[^Katsu]

Received Setup

http://s1369.photobucket.com/user/RetroCollect_K/media/Mobile%20Uploads/20140507_054901_zpsxyhmgfbm.jpg.html

Amp? As I don't have a cab, so I won't be needing this (yes/no) ?

http://s1369.photobucket.com/user/RetroCollect_K/media/Mobile%20Uploads/20140507_054834_zpsu6r1hvrn.jpg.html

PSU & Amp This PSU has a USA plug attached, is a stepdown essential? Or can I use a UK plug without nuking everything?

http://s1369.photobucket.com/user/RetroCollect_K/media/20140507_054910_zpssttpozpe.jpg.html

JVS I think this is a SEGA JVS?

[J0e Musashi]

JVS converts it to JAMMA, so it'll run on your SG. You should be able to swap the plug for a UK one, but check the ratings first.