"That picture is the whole recepticle. I haven't ever touched mine I could be wrong but most relays just unplug. There will be a part number and most manufacturers use a common supplier such as Bosch or now the Chinese knock offs. Pull the relay…"
"Driver side it has a hose running to it and pushes the clutch fork. This is where you want to observe the throw. Maybe about an inch is all it moves but it looks significant. If little to no throw you have found your problem."
"You need a helper to push the clutch pedal while you watch the slave cylinder for throw. Check your fluid level , it doesn't take much air to reduce the throw to an unusable level. Bleeding it might get you down the road temporarily but most…"