trouble shooting brake fluid leak

[240dddd]

I'm helping a friend with his manual transmission 79 300D. The clutch pedal went soft a few days ago. The fluid reservoir was very low. I refilled it which didn't fix the problem, so at the very least the clutch needs to be bled.

I've looked for leaks around the master and slave cylinder and haven't found anything obvious, however there is brake fluid dripping off of the bottom of the transmission bell housing. The drip accelerates if I pump the brake pedal.

Is there any hose or brake line around the top of the transmission I should be looking for?