Throttle cable question

Both my MTD Trailflight and Sportstyl Alley Kat had the throttle cables replaced. Unfortunately they were butchered when put on. My question is I see ones on OldMiniBikes at 53 inches long and ones for specific brands at various lengths. What is the correct length for both my MTD and Alley Kat??? Do I just buy the 53 inch one and cut it down to fit like previously done??? Thanks
There again it’s a’ll need to decide on a route you want it to go...measure distance from throttle control to carb via route you picked...either buy cable length you need or you can buy the 53” and cut to length....
If you cut be sure to get good cable cutters...most out there are for copper and aluminum they will only last a few cable cuts before they start fraying your cables....