You need something like this:
https://www.amazon.com/Vertical-Blind-Repair-Saver-White/dp/B00Z8EHRXQ/ref=mp_s_a_1_5?crid=1D773AVF6NIQQ&keywords=vertical+blind+repair+tabs&qid=1683466220&sprefix=vertical+blind+re%2Caps%2C223&sr=8-5