The fusible links are in the engine compartment. A '77 only has one, between the battery and the Jeep. Connection to the battery is at the starter solenoid, where the (+) battery cable from the battery connects. They just look like wire. Suggest you don't worry about them unless you lose power to the Jeep.
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk