I'll start with the easy one, the B1G-E:
The 8-0 Buckeyes have already clinched a share of their eighth straight B1G-E Championship and their tenth straight B1G-Divisional Championship. Ohio State has literally won at least a share of the B1G-E in every year that there has been a B1G-E to win a share of.
Michigan is a game behind the Buckeyes and will be playing this Saturday for what would be their second B1G-E Championship and first-ever B1GCG appearance. Their previous divisional title was a co-championship with the Buckeyes inn in 2018 but the Wolverines lost the H2H tiebreaker.
All other teams have at least two losses and are thus mathematically eliminated from winning any portion of the B1G-E.
Now on to the B1G-W:
Nobody has clinched anything in the B1G-W yet. Wisconsin (@MN) and Iowa (@UNL) are the co-leaders at 6-2 but both are playing on the road this weekend against credible opponents. Meanwhile Minnesota (vsUW) and Purdue (vsIU) are both 5-3 and playing 1at home this weekend.
Thus there are three games relevant to the outcome of the division so here is a handy-dandy table of the eight potential outcomes:

If Wisconsin wins (scenarios #1-4) they go to the CG. The only question is whether they go as co-champs with Iowa (#1-2) or as outright champions (#3-4).
If Wisconsin loses and Iowa wins (scenarios #5-6), the Hawkeyes go to the CG as outright champions.
If Wisconsin and Iowa both lose that creates a three or four way tie for the B1G-W Championship between the two of them, Minnesota, and possibly the Boilermakers (scenarios #7-8).
In scenario #7 the first tiebreaker is H2H2H2H where Minnesota and Wisconsin would both be 2-1 while Iowa and Purdue would both be 1-2. That eliminates the Hawkeyes and Boilermakers. Then Minnesota and Wisconsin revert to their two-team H2H and Minnesota wins.
In scenario #8 the three teams all went 1-1 against each other so we move to the next tiebreaker which is divisional record. The Badgers win that because both of their other losses were to B1G-E teams.