Sorry to confuse the issue, but I do have the BSP pages for the 2500M / 2500MM / 2500MMG and they differ from what Ed posted. I can PM or post a 6 page PDF, but basicilly I show the following for the 2500MM:
OR/BK: Network terminal C with white switchook lead;
G: Network terminal F with ringer B and green line cord lead ;
BK: Network terminal RR;
RD/GN: Network terminal R with black switchook lead and handset W;
W: Network terminal GN;
BL: Network terminal B with black handset lead;
WH/BL: Network terminal S (or any blind terminal) with green handset lead and red switchook lead;
RD: Network terminal T (or any blind terminal) with red handset lead;
GN lead from switchook: Network terminal A with red line cord lead;
YL lead from switchook: Network terminal G with yellow line cord lead.
BR lead from switchook: Network terminal L1 with black line cord lead.
RD lead from ringer coil: Network terminal K;
***Insulate and store the following dial leads separately*** (Wires not shown on my print)
Note that the White and Blue Line cord leads were optional connections to the ringer and normally taped off.
PDF file available at: https://www.jknichols.net/db5/00440/jknichols.net/_uimages/2500M.pdf