I have a 1990 Isuzu trooper i am wondering what is n line between the clutch master cylinder and the slave cylinder

https://www.youtube.com/watch?v=nEv4S_tMIHA
https://www.youtube.com/watch?v=p77NuzSraUQ
https://www.autozone.com/repairguides/ISUZU-Amigo-Pick-ups-Rodeo-Trooper-1981-1996/CLUTCH/Clutch-Slave-Cylinder/_/P-0900c1528006286c

If hydraulic clutch could be a leaking line or bad slave or master cylinder.

clutch fuild leaks due to bad slave, bad mc or lines

you need to bleed it some more. Don't forget you have a master and a slave. The slave is the pain. My shortcut to bleeding it is to loosen the bleeder screw and compress the plunger. Make sure you got plenty of fluid close the screw and release the plunger. Then bleed normally. Also make sure your master and slave cylinders are working properly

this symptom would typically be solved with a new cluth slave cylinder. Check to make sure the fluid is full in the master cylinder reservoir. If the fluid is empty then there is either a leak, or the clutch is has worn. filling the reservoir and bleeding the system may get you back on the road.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

i had that problem with my car and all i had to do was put fluid in it and pump it up but it could be your clutch slave cylinder

check your clutch reservoir for fluid leaking could be your clutch master or your clutch slave cylinder,very where the leak is comin from and go from there

It should be on either the master or slave cylinder

Have seen em put on with the bleed screw at the bottom by mistake ?

To determine which type of clutch you have, servo hydraulic or cable.
Look down past the engine bell housing and determine the existance of a hydraulic clutch slave cylinder.(a piece of casting with a rod facing towards the rear of the vehicle pocket into a bracket protruding out of the gearbox bell housing. As well as a pipe and bleed nipple to be crude)
(which I believe you have).The hydraulic fluid for this unit is sourced from the brake master cylinder reservoir via a sneaky pipe partially obscured to the clutch master cylinder on the internal firewall.If you have no clutch slave cylinder near the bell housing there would be an obvious bounden cable running from the firewall down to the outer of which will be stopped at a bracket hanging off the engine.The inner will continue to a bracket protruding from the gearbox bell housing.