hook in

hook in (to something)

to connect into something. We will hook into the water main tomorrow morning. We dug the pipes up and hooked in.
See also: hook
References in classic literature ?
Then it threshes about wildly, until it receives hook after hook in its soft flesh; and the hooks, straining from many different angles, hold the luckless fish fast until it is drowned.
It was designed by Mary Hook in the early 1950s for her own use.
About half of all Hanoi burglaries in West Yorkshire are 'sneak-ins', where thieves have simply walked in through unlocked doors to snatch car keys which have usually been left in obvious places, such as on a table or on a hook in the kitchen.