It will likely wick into the interface with a little help by prying open the slot if necessary, and will make for a strong bond.
A slight interference-fit is best, and can perhaps be effected by squeezing the hole slightly in a vise, at which point you wouldn't need any LocTite.
I've used the red LocTite many times for things like bonding a loose-fitting lower headset race onto a fork steerer, or bonding a round nut into the socket on the ear of the seat lug, or securing a pedal into a stripped-out mtb crankarm!.
I even used this stuff for retaining the main bearings into the worn-out cradles in the engine cases of a 10,000 rpm motorcycle dragster, and the LocTite didn't go anywhere between rebuilds (despite the severe loading and certain amount of flex).
