Wiper Motor Install (Grommets, Seals, Timing Marks)

[Rich72C10]

I ended up taking out my wiper motor to install an after market pump but in the end I went with a Universal Tank Pump from Amazon. I am now getting close to reinstalling it after getting seal/grommets from GMCPauls (arriving today via USPS). As I been looking at the wiper motor more and more (while waiting for my parts) I have some worries.

1. One of the Grommets have a special ground tab, which as I have read is rather important for the motor to go to home/park position. The Grommets are sold as "each" and not a set and the photo on GMCPauls does now show a ground strap. I have seen two other sites that sell as a set Summit and Rich's Camaro. Perhaps GMCPauls will actually send one with a ground strap. Or I'll need to fab one or waste the GMCPauls and order what appears to be a proper set from other vendors

So, if the Grommets from GMCPauls are without a ground strap, what is the best approach? Order proper ones? Even with a ground strap, the original one is riveted on. I have't a way to re-rivet - anyone can share their ideas what they did to insure the motor has a good ground?

2. I have an original Service Manual and on Page 12-19 it talks about the Crank Arm Groove and then the Gear Case Groves. I removed the crank, thinking I needed to come off to remove the motor from the firewall (I have a new seal for this too). My problem is I think I moved the motor a bit when removing the nut. Now looking at the Crank and Motor, I cannot figure for the life of me where these Crank Grooves are at.

What is actually the park position of the motor? Can that even be determined without pulling it apart? Idea's on how to figure this out?

I see some lines on the Crank and Motor but it really does not seem to match up with the photo is showing, so I am going more on how the motor / crank looks from figure 20 (page 12-19) Wiper Motor Crank - Arm in Park Position.