wiring an vintage L-90 pickup ?

Hey folks ...

I found an old L-90 pickup (black, curved blades, square housing, just saying lawrence on top)
in an old German Framus SG from the 70ties.
Now my question is how to wire this pickup?
It only has 3 conductors ... red, black and blank ...
Is this pickup splittable?
I want to wire it into a Telecaster in the neck position ... using 3 way switch and may be one or two
on/on switches für splitting and/or outphasing if the L-90 could do so ...
Please help me ... how this pickup is wired and how it should be wired in ..

Greats from Germany ... Andy