"accidental connection" is a correct and usable phrase in written English.
You can use it when you are referring to an unexpected event in which two things become connected. For example: The hotel bar was the setting for an accidental connection between two strangers who would eventually fall in love.
The late graves dug from a higher level have only an accidental connection with the mastabas.
Cusk uses a technique of passing, sometimes accidental, connection, reminiscent of a Robert Altman film.
It's completely an accidental connection.
The latter option, he says, "allows you to look at it from the perspective of performance art or a gallery," with a shifting point of view and accidental connection with other audience members.
Cords are provided that prevent accidental connection to circuits that provide the wrong voltage or current.
But there are other, accidental, connections.
The Beastie Boys became an institution — one that could have arisen only amid the artistic, social and accidental connections of New York City.
"Jellyfish" is the kind of movie — not quite ubiquitous, but not exactly rare either — in which the accidental connections between lonely city dwellers are given a magical glow of serendipity.
It has always wreaked havoc on subway equipment, gumming up relays, shorting out signal blocks and sometimes bursting into flame when it combines with water and grease and forms accidental connections to the third rail.
"Gen's ideas about accidental connections between visuals and music are very much at work in Yoshi's visuals, where there is continuous frenetic activity to latch on to and assimilate whatever sounds are passing by," Zimmerman continued.
As Jung-Beeman and Kounios see it, the insight process is an act of cognitive deliberation — the brain must be focussed on the task at hand — transformed by accidental, serendipitous connections.
