Not sure how high you have the BB lifted in this photo
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but shortening the the top link will increase the aggressiveness of the inside cutting edge driving forward, while lengthening the top link increases the aggressiveness of the rear cutting edge while driving in reverse.
Shortening the top link will also provide a bit of additional height to the rear of the BB when raising the 3ph.
A BB is one implement that greatly benefits from a quickly adjustable top link (hydraulic) as frequent changes affect how it performs. Short top link digs aggressively going forward, while a longer top link spreads out material and lets the rear cutting edge smooth the released material while going forward. It can be done with a manual top link but not near as quickly or simply.
I have no ideal if you have rear remotes (could not tell in photo) but you may be able to route a set of hoses to the rear from your 3rd function to run a top link.