This is a two-piece Replacement Ignition Module for the #2007 and #2008 Magnaspark II Distributors, 2018 and older (2019 and newer versions of the MS-II Distributors have a one-piece module design, see part# 2012).

The included Adapter Plate allows you to install the updated MS-II Module into the older MS-II distributors.

Red Wire goes to 'B' (battery), Black Wire goes to 'C' (common).