I have not seen any recent comparable Big Ten games that started before 7. It also could easily start at 8 p.m.
One note is that Ohio State at Minnesota will take place on LDW Thursday Sept. 2 as well. That one seems destined for an 8 p.m. kickoff.
Some further comparisons:
UMass at Rutgers in 2019 (Friday of LDW) started at 7 p.m.
That same year, two other Big Ten games on that Friday of LDW started at 7 p.m.
The day before (Thursday of LDW), Minnesota hosted a game that started at 9 p.m. on FS1
In 2018, NW at Purdue was on LDW Thurs and started at 8 p.m.; on Friday, Michigan St. kicked off at 7 p.m. on BTN.
In 2017, Minnesota hosted Buffalo on LDW Thurs at 7 p.m.; Ohio St at Indiana kicked off at 8 p.m.
The following day, LDW Friday, Rutgers hosted Washington and it started at 8 p.m.