Wonder if anyone can help a newbie with a bit of a problem?

I'm half-way through removing an M50 engine from a late 95' 525i that I'm going to put into my E30 Cab.
Getting the engine out is the easy part but I'm having problems with the EWS system .
Q1. After an hour of scratching my head & getting nothing but splinters in my fingers, just how do you get the small loop aerial off the ignition key barrel?????
Q2. Where are the EWS II module & the TX/RX module fitted in the car?

Hope someone out there can help.

Many thanks

Iain S