What’s this strap for on the manual transmission hump

I have to make my wife comfortable or ride alone. Next guy can put the bench back in if he wants to. It’s not like back in the day when she rode in the middle. We’re married 51 years now.
You might be looking at this backwards. LOL Truthfully I'm with you I like having my Lady of 28 years with me when cruising. Once in a while she will still flip up the armrest and slide over. How many more years do I have until this stops? 51 minus 28 = 23 x (pi) minus menopause = Y ?