Ex-div or Cum-div Share price in a Convertible debt Scenario

Dear Lisa,

I watched one of the Topic Explainer videos on YouTube (Business and Asset Valuations) wherein Jo Tuffil shared a question on convertible debt.
The question clearly stated that the shares are “currently trading on an ex dividend basis, ” meaning the share price is ex-div.
However, I’m curious about what to do if the share price is cum-div in a convertible debt scenario.

I am assuming that if I use the cum-div price, the dividend will be effected in the growth.

Please help with clarity on this.