C4 Valve body

Looking for some help on a c4 Transmission thats currently in a 66 mustang. Apparently the valve body is a later model than 66 but when removing the trans filter a small pin and spring fell out of the valve body from behind a tab on the trans filter. Didn't see how it came out. Does anyone have a diagram or know how it goes back in. I've posted a picture that has the transmission filter boxed in and the tab on it that i believe this pin and spring fell out of the valve body from. how does it go back in? i dont see any wear marks on either side of the pin to give any suggestion to how they may have been placed behind it. any posts would be greatly appreciated.

- shawn

spring and pin

thanks for the post. just to make sure before i zip everything back together. but i've attached a rough paint document that looks like a 3 year old made just to make sure it's going back in the right way from your description. please lemme know if thats how it goes