94 SL500 Crankshaft Position Sensor mount removal

[212MSL]

I have a '94 SL500 and have determined that the crankshaft position sensor needs to be replaced. Tried to remove old sensor, but approximately half of it is broken off and still in the hole. Have tried to remove it, but access is difficult and decided that sensor mount will need to be removed. Seems that mount is bolted to engine, and one bolt is accessible but cannot find any sign of second bolt. See photo, accessible bolt is on left side, partially removed (flywheel visible above it) Puzzling, where is second bolt, or is it mounted in a different manner? Thanks!