I hesitate to give a grid ref but try SC425825 - it is 200m due east of Ballacogeen (see discussion!) but track through it doesn't seem quite to reach to the B12 (on which is Lonan church) thus as Mary suggests need approach from south along road crossing tram line just as line sweeps round from Garwick glen to run along main road - take the 1st track on right after 1km for Rhaa, 2nd track 100m further on for Ballacogeen.

Ballacannel is to east of Lonan church

Grawe is to north of Lonan church