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Hi
Neither the Peco PL13 or the Hornby R8243 surface mounting point motors can have direct fitting switches (unlike the PL10 or R8014).
You could fit micro switches opposite the moving tie bar so as the point is moved over or back the micro switch makes or breaks its contacts?
I have seen a PL13 switch bonded to the underside of a point directly under the tie bar and a Hornby style track pin also bonded into the hole in the tie bar and then passing down through the PL13 to operate it, but it does mean digging out a suitably sized recess in the top of the baseboard to accept the PL13 and wiring.
The only other alternative as is stated by RFS and use a building or removable scenery etc to hide the motor and switch assembly, a bit like this example....