Check this score motor sw. and/or the make/break on the Outhole relay. And which two relays in the back keep running?

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The two relays are likely 1&2 and 3&4 reset. Look like this? They'll keep trying to reset as long as you have the reel problems.

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For the ball kickout also check the score motor sw. I pointed out before, 4A, and check these two score motor sw. (the pulse reset) for the running backbox relays. The contacts need to be clean and making well.

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Check P.7 of the superb manual for the reset operation and make sure everything is doing what it should: https://www.ipdb.org/files/2253/Williams_1976_Space_Mission_Instruction_Manual_Jan_1976_no_schematics.pdf

The thing to figure out is why the reset relays in the backbox keep firing. Are all the contacts clean and making good contact? It's great fun trying to check double-stacked switches, so you're best off removing the top row so you can get in and carefully sand the contacts with 600# sandpaper and make sure that they are making contact when they should and remaining open/closed when they should.

That was quick. Go back and check what I added to my last post.

Good catch, Rolf!! So, Sea Wolf, another thing to look at: Index-D ...

Here is another must-read reference: http://www.pinrepair.com/em/index1

Do you mean the center Swinging Target?

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I would go back and carefully look at everything you did and make sure nothing is bent, shorting, etc. Gently push the plastic pieces that hold the switches and look closely to make sure they make contact where they ought to and open when they ought to. Don't do anything new til things are sorted out. And stay calm and do your breathing; we've all been there!

Sometimes it's good to step back for a bit and think things over. Pins are pretty logical: good contact must be made, bad/poor contact avoided, etc. If something needs to be energized by another thing and isn't, it won't work. If you look at the link in post 30 and read down there is a part about reading schematics. Check that and try to follow some things thru on the schematic. Do something simple to start, like on the 6v. side (lites, on the left). Once you get the concept it's easier.

Check this circuit for problem #1. And for the weak kickout, did you check the things I noted about that in past posts?

I had a problem with that upper extra ball RO coming on, along with it giving double-bonus on the side kickouts early, that turned out to be a short. This could be similar, so look carefully for things touching that shouldn't.

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Loosen the two screws that are on the switch stack first and clean the contacts with 600# sandpaper and/or a swab with 91# rubbing alcohol. Hold the sides of the stack when re-tightening the screws to make sure that everything is lined up correctly.