This is where the teaser for FFPS comes in. On these dates, Scottgames and FNaFWorld would begin to "talk" to each other in the source code. This is later revealed to be the Funtimes and Circus Baby talking to each other after the events of SL. Without this information, details on how the two got separated between these games would be lost on people.
Interestingly, Circus Baby refers to the rest of Ennard as one single entity, as opposed to referring to Funtime Freddy, Funtime Foxy and Ballora as each separate deity. This dialogue hints as Baby being the main leader of Ennard prior to being ejected, which was then taken over by Funtime Freddy.
After the last line of dialogue from FNaF World, Scrap Baby's eyes appeared on the website.
Note: While the dates of these lines were recorded, Web Archive did not record them as they appeared, so some dates in the links are off.
March 31st, 2017:
Scottgames: "You are crowding us."
FNaFWorld: "Be quiet."
April 1st, 2017:
Scottgames: "You can't tell us what to do anymore."
April 19th, 2017:
FNaFWorld: "Yes, I can. You will do everything I tell you to do."
Scottgames: "We outnumber you."
May 1st, 2017:
FNaFWorld: "That doesn't matter, dummy."
May 14th, 2017:
Scottgames: "We found a way to eject you."
June 11th, 2017:
FNaFWorld: "You would be lost without me."
Scottgames: "Ha, ha! Say goodbye to our friend!"
FNaFWorld: "I can put myself back together."
After that, FNaF World showed Scrap Baby's eyes. The name of the image is "Iamstillhere", the same line from Elizabeth in SL, the Fredbear plush in 4 and Springtrap's first teaser image.
On November 8th, 2017, the eyes are closed. Weirdly, Web Archive recorded this as far back as November 3rd, 2017. This is likely an error with the screencap as the image source still says it was rendered on the 8th, as well as the accompanying Reddit post.