After going through the parts box, I found these items. A brass fitting in the top fill hole for an Alpha unit, I think it was off of an 86 Welcraft. And the line that goes with it between the lower unit and the fill bottle.
Since I have a 1983 Alpha, which I've been told that it's an MR (pre-Alpha), should I use this? Or just put a plug in the top where the fitting is? To be more clear, the 83 lower does not have a fitting, but the 86 does.