When the ball drains, does the Outhole relay and ball index relay pull?
If they do. You may have to clean the following switches.

If they don't pull then you will have to look at why.

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It looks like the the ball index start pulling when you score points, and then release at the end of ball. (If you don't have an extra ball)

I would check these three switch. (I suspect the motor switch)

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If you don't score any points during a ball, it allows you to replay the ball. (an EM's ball save)

I would check the reset relay make or break switch. For the 2nd coin relay (Latch/trip). It should not be "Latched" for the 1st player.

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For the 1000 scoring for player 2.

I would check the player relay is making good contact. (It looks like there is one for each score reel).

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Ok, I suspect the open Bottom gate relay is stuck on.
It should turn off after you score 3000 pt and the gate is open. (The two switches in green).
I would suspect the Bottom gate sol. end of stroke.

Note: There should be two set of leaf switches one should be open (Green) and one should be closed (blue) while the gate is open.

The switches in blue are the path that trigger the gate to close.

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Clean and gap this switch on the open bottom gate relay.

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It should be the White-Orange and Yellow wires.

W-O should go to the 3000 relay. Check if they are making good contact an no broken wires or solder joints. It make go through a Jones plug.

That is the theory. I have never done it. I usually replace the coil.

Does the left alley score 3000 pt? (I suspect not).
Does the 3000 pt relay pull? if it does, does it pull and release right away, check the 10c motor switch (From the 3000 pt) and the 3000 pt relay switch from snippet.

Ok I would make sure the open bottom gate target switch is clean and has the correct gap.

I would also recommend cleaning and gap this open bottom gate re. switch highlighted in green. it may need the gap a little closer.

Because the left ally target score 3000 pts. the the 10c SCM. is ok (in red) and the 3000 re switch is also ok (red)

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Good to hear. You may want to open another thread. You have "Solved" in the title. (I don't have this machine, so I can't post a pic),