Kambosos needs to initiate that and be more aggressive not just allowing Haney to take over and keeps his fighting style dominates, Kambosos chance is to keep trying to break the defense of Haney and also avoid those counter jabs to make a good numbers with his score cards, he already have an idea if how Haney fought so his camp needs now is to bring something unexpected for Haney, Kambosos camps needs to bring him a sparring partner who got similar fighting style of Haney.
He needs to find ways to find an opening and make Haney to make a mistake and engage with their exchanges of punches.
Also, Kambosos must not approach Haney directly, he will be susceptible to jobs and counter-attacks. Kambosos must approach Haney at an angle where Haney's counter is ineffective. It needs fast reflexes but it is worth practicing.
In their first match that jabs really protects Haney and made him win with the scorecards, Kambosos needs break that protection in a manner of countering those jabs with a great timing to create opening and exposed Haney, it's a lot of adjustments and good body movements, if he will able to find that way it would be difficult for Haney to use his stuff in covering to Kambosos aggressive punches.
If you look at the previous fight, Haney prioritizes distance more and he is not in a hurry in carrying out his strategy. We can see when he attacks and is about to be countered by Kambosos he immediately keeps a safe distance and always starts from the beginning. On the other hand, Kambosos has been carried away to Haney's battle scheme which makes him unable to avoid and ultimately loses in absolute terms.
The moment Haney dictates the tempo of the fight, Kambosos already lost the match. So this coming match, Kambosos shouldn't let Haney dictates the pacing of the fight. Kambosos must come up with some strategy that will make him nullify Haney's attempt to dictate the tempo.
I could say that Kambosos needs tons of adjustment if we want to reclaim his belts. Styles make a fight and it seems to me that Haney's style is not suited for a slugger like Kambosos, the latter is a bit slow for Haney. The first fight is not even close so for me and changing one's boxing style can't happen overnight so for me this exercising of the rematch clause is just for the money, result will be the same (just my two cents).
That's his problem, he was very slow in their first meeting, Haney can predict his game plan so he cannot win if he uses the same strategy. I think he needs to conserve his energy, be a counter puncher and make the right timing, that way if he can hurt Haney, there's a win that he can win by KO.
One good timing to land a solid combination will change the direction of this fight, like what we have seen from their last match Kambosos game plan was well read by Haney, those counter jabs hurt Kambosos a lot so he needs to find ways to counter that plus he needs to make solid conversions, a wise in throwing punches will conserve his energy and might bring him the belt back.