Where are the Ignition Coil Connectors?
The three Plug Top Ignition Coils each have a connection ( +ve supply )
from the Engine Management System ( EMS ) Relay Pin 5,
which is located under the left Side Panel ( Relay No.2 ) :

The output wire(s?) from Pin 5 of the EMS Relay is/are coloured Brown with a Pink Stripe.
I don't know without going and looking whether there is one wire from the Relay
that splits to become 3 ( or more ) wires for each of the coils at some point later in the harness,
or whether there are 3 wires connected at Pin 5 of the Relay that each go to an individual coil.
The other "trigger" side of the coils are connected to the main Engine Control Module ( ECM )
which is mounted behind the Headlight.
Pins A01 and A13 of the ECM are also supplied by Pin 5 of the EMS Relay
using Brown wires with a Pink stripe.
The Trigger side of the Coils are connected as follows :
Coil No.1 via a Green wire with Pink stripe to ECM Pin B14
Coil No.2 via a Green wire with Purple stripe to ECM Pin B15, and
Coil No.3 via a Green wire with Black stripe to ECM Pin B16
The above information, together with Circuit diagrams and further information
is available in the official Triumph Service Manual - available from any authorised Triumph Dealer.
Cheers

