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Studies of massive black holes (BHs) in nearby dwarf galaxies can provide important constraints on the birth and growth of the first seed BHs in the early Universe. Using high-resolution observations from the Very Large Array comma Reines et al. (2020) discovered a set of compact radio sources in nearby dwarf galaxies with luminosities indicative of accreting massive BHs. Moreover comma some of these radio sources are not in the centers of the galaxies with offsets on the order of virgul1 kpc. As part of a pilot study comma we propose HST-WFC3 observations of 3 dwarf galaxies hosting radio-selected (..wandering..) massive BHs that also have guaranteed X-ray observations with Chandra. We propose narrow-band H-alpha imaging and wide-band optical continuum imaging to 1) determine spatially-resolved star formation rates and colors comma 2) search for faint comma small optical counterparts of the BHs comma and 3) determine detailed morphologies of the dwarf host galaxies. The proposed observations are crucial to asses possible contributions from star-formation-related emission at X-ray and radio wavelengths comma and characterize the properties of this new class of BH-hosting dwarf galaxies.