Quoted from paulace:The D and E relay "lock-in" switches are marked in yellow on this snippet. The both rely on the motor 2B switch to unlock.
[quoted image]
And if you are familiar with the timing chart on these games you'll see 2B is opened up late in the 120 degree cycle allowing the scoring to complete. Another timing tidbit, you'll see 5 pulses of the 1A contact to allow the 500 points, all before 2B opens...