Connecting e127 to a98, which will replace an L750

I use an e127 with digital sonar. I also use an old L750 sonar still working fine but the LCD display is failing and am considering replacing it with the a98. Both depth transducers are in use mounted on the transom but I will replace the old L750 transducer with the CPT-100 if I do this. I have several questions.

1) The L750 head unit is mounted as was recommended per its instructions. Will the a98 fit the same [censored] without modification? If mod is needed what would it be?