'89 ignition module

How do I get to the coils and ignition module at the rear of the 2.5 U engine ? It's all I can do to hook up plug boots back there. Do I need to work from underneath ? Any advice appreciated !!!
Thanks,
Mac

the coils and ignition module (underneath the coil packs) are almost closer to the oil pan lip, than the top, so, under the vehicle would be the easiest access...
a small inspection mirror wouldn't hurt either.