Cuba did some weird things with their BTR-60, including slapping a BMP-1 turret on them, slapping a
T-54 turret on them, and making two different AA variants, one with a pair of 23mm guns and one with a pair of 37mm guns. According to Military Balance 2024 there are still a few hundred BTR-50/60/152 in Cuban service today, so they'd be around in the Twilight War era.
The CIA's 1979
assessment of Cuban forces, which was declassified in the 1990s, lists the following combat equipment starting on page 211:
Tanks:
PT-76, T-34(85), T-54/55, T-62
Assault Gun:
SU-100
APC/IFV:
BTR-40, BTR-152, BTR-60A/PA/PB, BMP
Recon Vehicles:
BRDM, BRDM-2, BRDM-2 w/Sagger
Infantry weapons:
Pistols: Makarov (PM), Stechkin (APS)
Rifles: AK-47, AKM, FAL, SVD, M52 (Czech)
SMGs: PPSh, M23 (Czech)
Machine Guns: FALO, RPD, RPK, PK/PKS/PKT/PKB, SGM/SGMT/SGMB, DShKM, KPV/KPVT
RPGs: RPG-7
ATGMs: AT-1 Snapper, AT-3 Sagger
MANPADS: SA-7 Grail
Field artillery:
Mortars: M1941, M1937, M1938, M1943 (both 120mm and 160mm of this model year), M-160
Field guns: 100mm M1955, 122mm Howitzer M1938 (M-30), 122mm M1931/37 (A-19), 122mm D-74, 130mm M-46, 152mm Howitzer M1943 (D-1), 152mm Gun-Howitzer M1937 (ML-20), 152mm Gun-Howitzer D-20
Anti-tank guns: 57mm M1943 (ZiS-2), 76mm M1942 (ZiS-3), 85mm D-44
MLRS: 200mm BMD-20, 240mm BM-24, 122mm BM-13, 140mm BM-14-17, 130mm M51, 122mm BM-21
Tactical rockets/missiles: FROG-5, SSC-2A Salish*
Towed AA guns: M-53 12.7mm, ZPU-2 14.5mm, ZPU-4 14.5mm, ZU-23 23mm, M1939 37mm, S-60 57mm, M1939 and M1944 85mm, KS-19 100mm
Self-propelled AA guns: BTR-152A with twin 14.5mm, ZSU-23-4, M53/59 with twin 30mm, ZSU-57-2
*these were actually SSC-2B Samlet, the conventional warhead version of the nuclear Salish