Onimusha 3 Oni Warrior Rodeo restoration help

[vholf]

Hi! I'm completely new on Pachislo (I'm more of an Arcade games guy) but I was given my first machine for free so I'm trying to get it to work. There are several problems with it, I'm hoping to get some help to move forward.

1. It was missing a 220v to 110v converter (it's 220 where I live) FIXED
2. Hopper was missing, I got a compatible model FIXED (I think can't test at the moment)
3. Missing coin lock
4. Missing Speakers
5. It needs reset and I do not have a key, plus the key slot is botched, I guess someone tried to reset it and broke the switch.

I will be making the reset switch mod here, so hopefully reset will work.

There are some loose wires which I believe are for the speakers which are missing, would someone please confirm this?
20201209_225501 copy.jpg

There is also this piece, which I'm not sure what it is for but I assume it's for the coin lock? Will it affect the machine functions if it's not properly connected to a lock?
20201209_225440 copy.jpg