installing wiper pump, which wire? Options

[914 RZ-1]

I'm installing a pump for the washer fluid instead of using the spare tire. I can extend the black/brown wire to the pump. Can someone confirm which wire that is?

I'd like to hook the pump up to the wiper stalk and not have to run a separate switch. I've read it can be hooked up so the intermittent wipers will run it. I have a '72; do I have intermittent wipers? I could not find any reference to them in the owner's manual, so I'm guessing I don't. I've included a picture of the wiper/turn signal assembly for reference.

How do I tap into the wire on my existing stalk?

I've read I can get a 911/924 wiper assembly and it will work. Is this true and will it fit my car? How does that option work?

[914 RZ-1]

So I'm looking for a 924 wiper switch. What year? Is there a part number?

Can anyone confirm that it looks and fits the same as the 914 wiper switch, but just has the extra connection needed?

I've seen them for sale, but cannot conclusively confirm that it will fit.

Thanks for all the input! (IMG:style_emoticons/default/beerchug.gif)