Apr 18 - Where do I place the written accent on the verbs that object pronouns are attached ?

Querido(a) profesro(a): I have been studying Spanish for 8 months in Canada. When the direct and indirect object pronouns are attached to the verb in the first person plural affirmative commands, on which vowel do I place the written accent ? For example: compremoslo, llamemoslos, sentemonos, vistamonos, demoselo, Muchas gracias! un abrazo, DJ