Two easy Williams EM questions

[shogun00]

1.) Usually, it's the other way around for EMs, but I'm not 100% sure since I never played the table.

2.) That's the credit light.

[JerryTubs]

I took apart my OXO (my only pinball machine) without properly noting its behavior. Now that I put it back together digitally I have two questions.

I 'connected' the 3 chimes to the score counter in the following order:

Tens digit: high chime, Hundreds digit: medium chime, Thousands digit: low pitch chime

Is that the right order or is it the other way around?
fedloan|irs.gov|easybib

2. There's a white plastic light cover in the apron next to the left flipper above the info card. What's the function of that light?

Thanks!