Strapon harness help

Hi, bought the "Red Rider Unisex G-Spot Strap-On Harness Kit 7.5 Inch" a while back but it isn't something used too often however the harness has come unfastened and not sure how to properly fasten the straps back in, any videos or tips how to do this back up?

Thanks

Contact customer service I’m sure these helpful people will be able to sort your problem.

its not a proper fault, the harness has just come undone just dont know how to fix