Did you try the bottom? Haven't tested it myself, but that'd be my next guess.
If that doesn't work, I'd try the pipe made for sucking fluids out of other mods' machines- sandstone, I think?
Bottom is energy input. Sandstone pipes are for fluid pipes, not lube hoses.
Edit: So, ive been holding out on saying this for awhile so that hopefully electricraft would be fleshed out a bit more and because ive actually only played with electricraft once, but ive come up with some ideas that may be useful elsewhere so ill go ahead and say it.
I would also like to mention that my computer has been broken for a few months and i have been waiting for the money/parts to fix it. So if i mention something that has been changed, its probably because i cant download the mod and check.
Anyway, i remember the generator/motor required considerable amount of gold, which i thought it didnt need, but regardless of if thats still true what about changing the motors/generators to a tiered system based on the wire/material used to make them? For example, an aluminium coil would give the generator a 1024 amp limit, and an 8 volt (or some multiplication of this) loss.
Also, i feel that some of the ores added by electricraft could be easily replaced by using secondary ore byproducts. For example, platinium ore could be easily replaced by a platinium byproduct from nickel (which i recall itself not being very useful, at least not in the amounts you got it) and silver could be replaced by tetrahedrite (or, more accurately, freibergite) which can be a primary ore of copper with a secondary silver byproduct.
Edit2: i also recall the superconductor not requiring platinium to be rather strange, and makes the platinium wire seem kinda pointless, considering silver and gold are more abundant.
Or, alternatively, silver ore could be replaced with galena, providing lead and silver. Lead could be combined with sulfuric acid and used as an alternative to the diamond spam recipe for low-tier batteries. Nickel could also have a great use as a low-to-mid tier battery alternative to diamonds as well. Cadmium and lithium (lithium from clay, maybe?) would also be nice diamond replacements for specific tiers as well.
Also, i noticed while researching for the above that molten lead has actually been used as a heat exchange for nuclear reactors, as it has advantages for safety (no explosions) and its a neutron reflector. I feel that this use alone could make replacing reactorcraft silver ore with galena something to consider, with molten lead being advantageous in being much safer then water or sodium, but less efficient and requiring higher operating temperatures.
Additionally, lead is obviously useful for radiation protection (upgraded concrete, maybe? Or just lead blocks. And of course hazmats) and could also be useful as a cheaper but lower pressure/temperature tolerance alternative to HSLA steel piping. And im sure there are other uses. Its actually a surprisingly useful metal.